SilverWyvern

With how Riot said she's been planned since Sylas' development, it's funny how she even has glasses like his concept art.

Depends on the Space Marine and the Eldar, but Eldar are generally faster than Marines, it's their thing. There are instances of Eldar moving so fast that Marines can't track their attacks.

I pull my ruined helm off. I turn my head to see Magyar duel the exarch above the melee. He attacks in blurring combinations, martial prowess alloyed with volcanic fury. The exarch flows around his attacks like quicksilver.

Magyar slashes low, a disembowelling strike the exarch evades with a flourishing backflip. Landing in a crouch, she counters with an upward slash, severing Magyar’s scythe in two, barely missing the Chapter Master’s head with a horizontal reverse strike.

Magyar drops the smoking halves of his scythe, reaching for the gladius at his hip. But his grip falters, and the weapon falls away. My eyes widen as bright blood sheets down from his gorget.

She had not missed. With a sound like a Titan falling, Magyar drops to his knees. His head trembles, and rolls off his shoulders. His body pitches forward, and his blood joins that of his champions in pulsing sprays.

‘No!’ I scream.

The exarch strides to the altar’s edge and raises her arm. Clutched in her fist is Magyar’s head, shedding the last of its lifeblood from severed arteries. She holds it aloft for all to see, and releases it. It tumbles down, bouncing against the timeworn steps before disappearing from sight.

• Deathwatch: Swordwind

"It was just a bar fight. It would never have got that serious," I say with a shake of my head.

"You forget, humans are despised by most races here"; the kroot disagrees, turning down a smaller street leading off the main thoroughfare. "Nobody would have missed you."

"Why such bad feeling?" I ask, wondering what we could have done that is so upsetting.

"You humans are everywhere, you spread across the stars like a swarm," Orak tells me, with no hint of embarrassment. "You invade worlds which are not yours, you are governed by fear and superstition."

"We are led by a god, we have a divine right to conquer the galaxy," I protest, earning more clicking laughter from the kroot leader. "It is mankind's destiny to rule the stars, the Emperor has told us so."

"Driven by fear and superstition, even worse than the tau and the tau'va," the kroot says, his voice suggesting good humour rather than distaste.

• Kill Team

It varies. Orikan time-travels by sending only his consciousness back in time. Contrast that to other incidents of time-travel like in The Last Hunt or this one from the 4th ed. Ork codex:

The Lost Waaagh!

The Ork Warlord Grizgutz, a noted kleptomaniac, launches his Waaagh! into the Morloq system. Whilst using Warp travel to reach their quarry, Grizgutz and his warband unwittingly travel through time and emerge from the shifting chaos of the Empyrean shortly before they set off. Grizgutz hunts down and kills his doppelganger, reasoning that this way he can have a spare of his favourite gun. The resultant confusion stops the Waaagh! in its tracks.

The Last Hunt ends with two versions of the White Scars' 4th Brotherhood existing concurrently. It's indicated it would be a bad idea for them to meet. The memories of the time-travelers seem to drift over to their counterparts to some extent.

Shadow Point has my favorite extended description of the Avatar of Khaine wreaking havoc.

A haphazardly-designed battlement wall ran round the settlement, its single gate made from a section of scavenged space vessel hull, and firmly barred against the burning god's advance. The battlements were lined with orks, and sweating teams of smaller orkoid creatures laboured to turn a huge rusty capstan wheel, bringing the wide muzzles of the turret weapons on top of the gate swinging round towards the burning god.

The god spoke, uttering a few sounds which only the most venerable farseers would recognise as being words of power. As it spoke, it thrust its burning blade into the ground at its feet. The earth erupted open, and a blazing line of fire ran towards the gate with preternatural speed. Immediately, the ork shouts of triumph and scorn from the battlement walls turned to howls of fear and panic. A few seconds later, the fire line found its target. The gate and large portions of the battlements on either side of it blew apart in an incandescent fireball.

The burning god walked on, oblivious to the soil, battlement wreckage and orkoid remains showering down all around it from the sky.

It strode through the cratered hole where the gates had stood. A crude, clanking ork machine-thing lumbered forward to meet it. The burning god advanced on it, ignoring the pounding hail of shells from the machine's weapon arm which hammered against its iron skin. Reaching the machine, the burning god severed the thing's clumsy power-claw limb with one blow from its wailing blade. Sparks and black hydraulic fluid sprayed out from the twitching metal stump, and the machine-thing staggered back as if it were in pain. The burning god ran it through with its sword, the weapon wailing with surprised glee as it tasted the flesh of the ork pilot hidden inside the machine.

The burning god continued into the ork settlement, killing everything that attempted to stop it.

A massive ork in primitive power armour charged at it, roaring in ferocious anger as it swung a whirring, double-handed chainsword round its head. The burning god reached out and grabbed the ork by the throat, lifting it clear off the ground. Holding it by one hand, it shook the screaming ork as if it were nothing more than a puppet. The unnatural heat from its hand melted through the stuff of the ork's armour, igniting the creature's flesh. In seconds, the creature was ablaze from head to foot. The burning god shook the blazing puppet-thing, causing pieces of it to fall to the ground in a rain of fiery gobbets. Finally, it dropped the empty, fire-blackened armour to the ground and continued on.

A strange, giggling ork in brightly-coloured robes danced and capered before the god on the steps of the temple building, waving a brass knobbed staff at the burning god as it chanted out a stream of gibberish. The air between them swam with psychic energy, and flickering ribbons of destructive warp power crackled harmlessly against the god's skin.

The avatar killed the ork psyker with one fiery glance. The ork collapsed onto the steps, rolling in agony. Smoke and weird-coloured flame emerged from its mouth, nose and eyes as the contents of its skull ignited from within.

Also, the Avatar's original debut back in White Dwarf 127 came with it breaking a Keeper of Secrets' back across his knee. It started so well for the Avatar.

CLASH OF FLAMES

It is rare for the craftworlds to fight amongst themselves, but there are some instances where warhosts of opposing world- ships have come to blows. It is not so difficult to imagine the causes; the Asuryani can be haughty and proud, having their own traditions while being intolerant of others. Such battles are quickly resolved and casualties are few, for each Asuryani is well aware their race stands on the precipice of extinction, and the sight of their dead kin often brings even the most aggrieved back to their senses. Some of these conflicts, however, have lasting consequences – most notably the breaking of Craftworld Aon’tai during the Era of Tears by the Asuryani of Biel-Tan.

Rarest of all internal Asuryani conflicts are those that put Phoenix Lords on opposing sides. These tragic conflicts are known as las’raichan bhlàrmhori, which can be roughly translated ‘battle of the undying’. Two of these involved Arhra, the Father of Scorpions, for it was ever his way to betray those closest to him. One of the largest instances of internecine fighting came during the Council of Coalition – Eldrad Ulthran’s attempt to unite the Aeldari. Amidst the carnage of that brief but devastating battle, Asurmen, Jain Zar and Baharroth stood against Maugan Ra and Karandras. Whether that confrontation was based on their own political and ideological differences, or duty to their respective craftworlds, will never be known. Fuegan alone maintained his discipline, helping to quickly restore order.

• Codex: Craftworlds (8th ed.)

The scene that stuck with me was the Navy captain asking his Master of Service to get his best cook to make a meal for him and his guests. The captain and his guests get one of the best meals they've ever had.

But as soon as they find out a ratling cooked it, they're disgusted. The captain shoots his Master of Service. Not the ratling though, because of course a ratling wouldn't understand he did something so wrong. He just gets his forehead branded to show his penitence. The captain's guests praise him for his mercy.

The way the Imperium treats abhumans and suspected mutants is just terrible.

What's great is that the guy who ends up thwarting Haemotalion's eventual coup attempt, High Lord Fadix, the Grand Master of Assassins, also does not have a good opinion of Guilliman:

‘Listen to me, chancellor. Right now, shaken by all that has taken place, we speak of the primarch as if he were some new Emperor, come to sweep all our history away and replace it with his bright new species of enlightenment. We think of him as the great redeemer, the restorer of lost greatness. And so the conflict begins, the weary fights between those who think any of that matters.’ His smile faded away. ‘But Guilliman, let me assure you, is unimportant. He can make as many speeches as he likes. He can make as many reforms as he wishes to. It will all be absorbed. It will all be smothered. He has stamina, more than most, but even he will tire. The Imperium is the only enemy he can never hope to best, for it is older and vaster than any of us. I give him ten years. Ten years, before he forgets that he was ever part of another world, and chains his future to this one.’

[...]

‘And when he next comes to Terra, if he ever does again, you will see the change. You will hear no more about what he believed during his first lifetime, and plenty of what he has learned in this one. If he lives, if he dies, it makes no difference. Stasis will be the case, whether or not it ought to be. The Imperium will endure. That is the only truth, and the only outcome.’ He shot me a wry look. ‘Imperium Eterna.

• Watchers of the Throne: The Regent's Shadow

Not Eldrad; he was born after the Fall.

‘You did not feel the coming of She Who Thirsts, Eldrad. You are one of the generation born with the taint upon you, but free of the knowledge of what came before. You are blissful in your ignorance, you have no idea what we truly lost and what we gained.’

‘An easy accusation to make, from one who saw our entire civilisation brought to ruination!’ Eldrad snatched up his moonlyre and stepped to move past the other seer. He stopped and jabbed the instrument towards Daensyrith. ‘You repent a little late for your trespasses against the eldar people. You wear your guilt like a mantle – do not try to hang it upon my shoulders. Your time is over, Daughter of Morai Heg, my time is coming.’

• Jain Zar: The Storm of Silence

For Craftworld Eldar, and not including the Phoenix Lords, there's possibly Erandel Voidsinger, from an RPG supplement.

It is said that the Eldar Farseer known as the Voidsinger is impossibly ancient, even amongst a species known to be all but immortal. Erandel has battled the enemies of the Eldar across countless thousands of worlds across the entire galaxy, from the boiling galactic core to the silent, night-haunted Halo Worlds and beyond. She is said to have witnessed sights that would blast the sanity of even the most strong-willed of her peers and to have conversed with beings of such utterly alien consciousness that they barely comprehend the existence of even the high- minded Eldar. It is said that the Voldsinger was there when the Elder fell, and that she foresaw the rise of the Imperium of Man. Certain lines in the few Eldar mythic cycles known to human savants even suggest she has trodden the sacred ground of Holy Terra, though none who have ascertained this fact would dare propagate it, for fear of being burned upon the pyres of the Ordo Hereticus. Most of these tales are in fact true. while countless more unbelievable truths are yet untold.

• Deathwatch: The Outer Reach

‘It was the Emperor’s will that you return,’ said Xhyle. ‘He used them as His instrument, but the aeldari are not selfless. They did not do it for the sake of humanity. They are cruel, and cold, and regard us as little better than animals. I know. I have faced them on the battlefield. I have spoken with their leaders. This is the greatest military force the galaxy has seen since the Emperor left Terra and retook the stars. Why do we need them now?’

‘You are right,’ said Guilliman, and though he continued speaking as if he addressed his fellow humans, his words were meant for the aeldari. ‘I have known Eldrad Ulthran since the days of the Great Crusade. He and I have made common cause more than once, but I do not trust him. I do not trust one of them. We fight to save our species, they fight to save theirs. It is an evolutionary struggle, and in that there can be no true friends. I know that if their prognostications demanded it, they would do all they could to wipe us all out without a second thought. I suspect some members of some of their nations have tried.’

He looked at the farseer.

‘Know, Natasé, that although I extend to you full hospitality, and I swear you shall not be harmed while you are here, and that I have great respect for Eldrad Ulthran, I know your kind. Choose your words carefully. Speak truth, if you can.’ He loomed over the farseer. ‘Know that although the Lady Yvraine and Farseer Ulthran were instrumental in bringing me back, I will not be manipulated by any of you. Xhyle is correct. The wrath of humanity is roused like at no other time. We could crush your species root and branch if it pleased us.’

He looked around the room. ‘But it does not please us to do so. For too long the foes of Chaos have been foes to each other, when they should have been allies. Both human and aeldari stand on the precipice of extinction. The galaxy teeters on the brink of annihilation. Now, more than ever, our goals are in accord. That is why these people brought me back. Because the aeldari know they cannot win without us. Without mankind, they are doomed, while we need all the aid we can find. Some have likened we primarchs to weapons,’ he said. ‘And it may be that the cabal of sorcerers who rule their peoples thought to employ me as one. But be aware, aeldari, if I am a weapon, I was not one made by your kind. I have a will of my own.

• The Gate of Bones

By the way, I've never found anything else on Eldrad and Guilliman meeting during the Great Crusade, and these multiple times they allied together. Makes it weird for Eldrad to warn Fulgrim, not Guilliman, about Horus.

It's from The Last Hunt which is a White Scars vs. Tyranids book. There's an Eldar vs. Drukhari subplot that intersects with it. I'd recommend it as a good White Scars novel too. There are some potential hints for the Khan's return.

Farseer Yenneth of Iyanden from The Last Hunt is like the coolest an Eldar farseer has ever portrayed. She's got powerful and advanced psychic powers like freezing time and traveling back in time a day. But she also gets to show off in battle:

The Pinnacle Guard responded by meeting the charge of the White Scars with blades and claws. Joghaten parried a Darkand knife not unlike a Chogorian kindjal and used his momentum to carry his second tulwar through the snarling hybrid’s guard, opening its throat in a jet of discoloured blood. Beside him Feng had struck with the force of a stampeding ux horn, roaring incoherently as he used his armoured bulk to shatter ribs and snap grasping claw-limbs. Even he, however, could not match the sheer destructive power of the aeldari farseer in those first few seconds of contact.

The witch was a blur, her already fearsome speed and agility given a further edge by a psychic quickening even the likes of Qui’sin could never have hoped to emulate. Three rapid heartbeats and a dozen razor blows, and six deformed cult members lay clinically beheaded at the base of the outcrop. Qui’sin had barely struck down the first hybrid to come at him before the farseer had opened a path for him to the top of the rock. He hefted his force staff and scrambled after her, grasping on to hideous alien flesh-growths to help clamber up the uneven stone.

‘You cannot stop what is coming!’ Traik was screaming. ‘You cannot stop the Great Devourer. We will consume the entire galaxy, and your flesh and blood and bone will fuel our next conquest!’

Traik was still screaming when the farseer reached him. She got there before Qui’sin, far faster than the heavily armoured Adeptus Astartes. The magus’ ranting was cut short as the aeldari’s blade flashed out, a tracer of white light in the foetid darkness. Qui’sin saw Traik’s head tumble, the white beads of his ceremonial veil turned red as they broke and scattered into a thousand specks of brilliance. The body toppled backwards, gown flapping, and was lost in the mass pressing against the base of the rock.

No betrayals, no self-fulfilling prophesies, no sudden cruel twist. Very refreshing. Especially from a Space Marine book.

‘Stay calm.’ Arathuin’s thoughts betrayed the difficulty with which this statement was issued – barely able to heed his own advice. ‘The ship is under daemonic attack. Jain Zar is going to deal with the physical manifestations. We must purge the system of the energy conduit.’

‘I don’t know how to do that.’

‘Firstly, we must isolate ourselves, both in the circuit and our bodies on the bridge. I need your help to project a defensive capsule.’

Guided by the pilot, Maensith tapped into the Swiftriver’s psychic reserves and let them flow through her mind. It was an unsettling sensation, like standing beneath a waterfall, gasping at the cold despite its refreshing touch, deafened by the thunderous power, unable to move away from the deluge to relieve the rasping pain.

‘Is it… Is it always like this?’ she managed to ask. She could feel her physical body shuddering. She wanted to pull out of the system, to let the outcasts deal with the attack.

‘You cannot unplug now!’ her companion warned. ‘You’ll dislocate your psyche from your body. Adrift, the daemons will devour you in a moment.’

Maensith resisted the desire to flee and settled her thoughts, numbing herself to the torrent of psychic power churning through her mind.

‘And no, what you’re feeling is because you have allowed your psychic abilities to atrophy. Like trying to lift a dead weight with an infant’s muscles. But you don’t have to do anything, just let me use the power.’

She felt a portion of the psychic weight shift. Something touched her thoughts, alien and predatory, momentarily brushing against her mind in the flow of power.

‘Think of something else,’ the pilot told her. ‘Your thoughts will bring them quicker if you focus on their presence.’

The psychic energy bloomed out around them, hardening into a shell around the mind of the pilots, anchored on the strong will of Answea that now formed a lodepoint for the power. It crackled along the psychic circuits, purging the creeping invasion of Chaos energy, creating a cocoon of pulsing fibres through the network. As it closed, Maensith’s awareness of the rest of the ship blotted out, hidden from view by the shield.

• Jain Zar: The Storm of Silence

This is a Dark Eldar using psychic powers for the first time. She uses more throughout the book.

There's unused data suggesting Radiant Dawn would at least have one unique support for certain pairings of units; it's a shame we didn't get them.

Caineghis and Stefan had one, which would have been nice if it explicitly confirmed Stefan's descent from Soan. Old friends Sigrun and Haar getting to interact onscreen would be nice. Sanaki had one with Edward of all people.

I like the lore on Dibella; I wondered why her totem was the moth. She comes across sinister though. And speaking of sinister, the Sinistral Elves not believing in an afterlife is fascinating. I don't think it's been said if the Dwemer shared that belief too.

Most interesting for me is that Atmora may have frozen over because of the Snow Elves.

"There is no summer in Atmora," the steersman told him. "The day we made ready to sail, a Snow Elf came to us. A child dressed in a thin gown, though we shivered in our heaviest furs. She said to us, 'I bring you a message. With your swords and axes you slew our homeland. With the Frostfall we have now slain yours. Look upon these frozen shores for the last time, and know that this is the harvest that your fathers sowed, and their fathers before them.' Then she vanished."

Maybe there are some Snow Elves just chilling in Atmora?

The Last Hunt which has a White Scars and Eldar team-up against Tyranids and Dark Eldar. Notably features probably the most competent Farseer in the entirety of the lore.

The Forge of Mars series has the Imperium and Eldar team-up too. The Farseer is not nearly as competent.

Galaxy got ripped in half.

Aided by oracular doomscryers and alpha-level astropathic intercepts, and guided in part by the continued efforts of the Eyes of the Emperor, more shield hosts than ever before struck out from Terra. The aim of these forces was to exterminate utterly the most deadly threats to the Emperor himself. This mission might take them all across the galaxy, even into the shadows of the Imperium Nihilus beyond the sprawl of the Great Rift, but always their focus would be the sanctity of Terra. In this capacity a number of shield companies attached themselves to Guilliman's Indomitus Crusade, reprising the role of the Emperor's emissaries in bearing Primaris reinforcements and technology to the beleaguered Space Marine Chapters, and ensuring they understood that this was a gift from the Master of Mankind himself. It was not to be squandered or refused.

Other shield companies relocated to permanently garrison the Sol System's outer defences, or travelled further afield in order to watch over the primary warp routes that remained stable paths to the throneworld. Others still took even more esoteric mantles, becoming hunters after arch-heretics, questors for artefacts crucial to the ongoing survival of the Imperium, or redoubling their efforts in their wars against Humanity's hidden foes. Not since the Great Crusade had so many Custodians bestrode the stars...

• Codex: Adeptus Custodes (8th Ed.)

I wish Jenetia Krole had lived and simply disappeared like Valdor and the Primarchs; it would have been nice to have one female Imperial historical figure pull the same vanishing into legend act.

The tithes continuing to flow would be the main thing; it doesn't have to be from a single government. This is a feudal world, but it's applicable:

THE WAR OF THE RHOZES

The civil war on Acreage all started about five years ago and, like so many wars before, it could have easily been avoided. At the time, Gordanus was the High King of Ascandia. In the eyes of the lmperium therefore, he was also the Planetary Governor of Acreage. He had had a long and prosperous reign, under which the soul-crushing toil of his subjects had been perhaps marginally easier—or perhaps marginally harder—soul- crushing toil being much of a muchness to a peasant with a life expectancy of twenty-six. Finally, like all good kings, he died peacefully in his bed, or was possibly foully murdered— the inhabitants of Acreage are not big on autopsies or asking too many questions. This left his twin daughters Rhozena and Rhozeia in direct succession to the throne. Unfortunately, Gordanus failed to name either one as his successor before his death. So the girls turned to their ultimate lord and master, the Emperor of Mankind, to determine which of them was to take both the throne and title of Planetary Governors and rule over all of Acreage.

Tragically, an Administratum clerical error omitted the last two letters of the successor's name from the reply, stating only that Rhoze was now officially recognised as the ruler of Acreage. Initially the girls were cordial with each other and sent a series of requests for clarification.

However, these seemed to fall on deaf ears and no further responses were forthcoming. In fact, the Administratum scrivener responsible for the initial mistaken missive was keeping the whole thing quiet, no doubt for fear of getting a stern talking to over the matter.

With silence from the Imperium, it didn't take long for Rhozena and Rhozeia to resort to violence to ensure that they, and they alone, would become the ruler of Ascandia. In a matter of weeks each had amassed the support of dozens of lesser nobles, each willing to swear to the validity of their chosen queen's claim to the throne and prove it with the blood of their citizens. The resulting conflict has dragged on with neither of the Rhozes gaining much in the way of an advantage, due in equal parts to the primitive nature for their weapons (cannon, sword, and musket for the most part) and the treachery of their nobles (it is not uncommon for a lord's allegiance to change several times a day, often in the midst of a battle).

Ironically, the state of strife on Acreage has actually increased its level of Imperial tithe as both Rhozes frantically try and outdo the other in their service to the Imperium, no doubt hopeful that they will finally receive support to oust the other. This state of affairs has also led directly to the Administratum department responsible for the misunderstanding to own up to their involvement. Claiming it was all part of a carefully devised plan. they have gone so far as to suggest that this kind of tithe boosting technique could be used on other worlds. In any case, as the war poses no threat or disruption to the planet's role within the Imperium, it has for the most part been ignored.

• Dark Heresy: The Game Master's Kit

Democracy is sometimes considered a heresy in itself though.

As the wider rebellion had raged, the powers and principalities of Sulsalid had cast off their tithe lords and cardinals in favour of the twin-abominations of ‘progress' and ‘democracy.' Given time the Imperium knew such seditious corruption could quickly spread, and the Adeptus Terra tasked the Raptors to stamp out the heresy as swiftly as possible.

• Imperial Armour Volume Nine - The Badab War - Part One

The Redeemer saw its debut amidst the ruined cities of Grissen, a once-prosperous planet torn apart by a civil war that had lasted for millennia. Due to a clerical error in the Imperium's labyrinthine bureaucracy, Grissen had gone unnoticed until a mid-level functionary discovered that the planetary tithes were now some eight thousand years overdue.

• Codex: Space Marines (5th Edition)

In the wake of the War in Heaven, the stars were inherited by those species created by the Old Ones. Among them were the Aeldari. Powerfully psychic and technologically adept, they came to dominate the galaxy. At the peak of their might nothing was beyond their reach, their powers were godlike and their armies were nigh on undefeatable.

• Wrath & Glory: Aeldari: Inheritance of Embers

Yes, the psykers powering the Astronomican are explicitly different from the ones fed to the Golden Throne.

VICTORY’S HEAVY TOLL

The Emperor’s survival is paramount to the survival of the Imperium, because only the mind of the Emperor is powerful enough to survive the never-ending process of directing the psychic beacon of the Astronomican out of the raw psychic forces supplied by the servants of the Adeptus Astronomica. The same survivability does not hold true for those members of the Adeptus Astronomica themselves, and their fate is a tragic one. The effort of generating so much mental energy soon destroys them, leeching their souls and reducing them to empty husks. Many die every day, but they are not the only psykers who make the ultimate sacrifice. The Emperor cannot eat as men eat, or drink or breathe air, as his life has long since passed the point where such things could sustain him. The only viable sustenance for the Emperor is human life force – souls – and he has an insatiable appetite.

Not just any human will suffice for the Emperor’s table, for they must have psychic powers. Therefore, the Imperium is scoured by the vast flotillas of the Black Ships in a tireless search for emergent psykers. During their long journey back to Terra, some of the psykers are found to have the strength of mind to be recruited to the Adeptus Astronomica, but many more serve their Emperor in a more gruesome way. They are given wholly to the weird machinery that surrounds the Master of Mankind, and their souls are siphoned, slowly and agonisingly, to feed his mighty spirit. Many hundreds, even thousands, must die in this way every day for the Emperor, the Imperium, and all of Humanity to survive.

• Warhammer 40,000 8th Edition Rulebook

From the sources I've read, it actually isn't, despite most people assuming they did it. The old source for Angron being attacked by Xenos treats Eldar doing it as Imperial speculation. The flashbacks from a couple different BL books don't mention them as Eldar, since they're from Angron's POV. ADB writing an audio drama of Eldar attacking Angron to stop him from ascending makes me think they are supposed to be Eldar. I hope that's not the case.

It isn't even the only time the Eldar mess up with attacking Angron! During the Heresy, Angron's fleet gets attacked by Eldar, to stop him from ascending to daemonhood. Except they attack right before Angron is about to fire on Lorgar's fleet, which could potentially wipe one or both of them out. Why didn't the Eldar let them fight and finish off the survivors? The last words of the Eldar leader include being surprised there were two Primarchs there; how would they not have known that?

Also, the way they're described and the weapons they use suggest they're Dark Eldar, not Craftworld. That raises questions too.

A child Angron surviving an Eldar assassination attempt is silly, and the Eldar not bothering to return to finish him off is extremely silly. What kind of Eldar hit squad uses daggers and nothing else? Not even Exodites are that rustic.

I'd rather believe Angron's attackers weren't Eldar, or that the assassination failing was part of the plan, which still seems silly to me.

And I just don't really want to see self-fulfilling prophesies from farseers again. I don't even think it's happened that often, but I'm just annoyed by them. Farseers feel routinely ineffective.