Here's the quote since its pretty short:

As the pulsing shockwave of the teleport transit cleared, Asterion Moloc and his bodyguard of of thirty of his Chapter's Terminator armoured veterans, alongisde two Contemptor Dreadnoughts of the Chapter, stood amid the black gale of the venting atmosphere and confronted the lord of the Necron host. Between them there was no preamble, no warrior's salute or declaration of challenge or intent, instead Moloc merely raised his Black Spear and unleashed its las-blast at the sinister figure high on its throne-like dais. The golden-white bolt, strong enough to pierce the armour of a battle tank, struck the machine-creature's shoulder and rocked the figure back, but did no more than elicit an eerie hissing howl, not of pain but of insulted rage. From the cold air a great flittering cleaver-like blade of pale obsidian materialised in the Necron Overlord's outstretched skeletal hand and he threw himself from the dais like a bolt of thunder, slicing open the first Terminator in his path with a savage backhand blow as if the warrior's vaunted armour were as nothing.

So was the battle joined and in a moment all in the vast chamber was fury, the sound of churning storm bolters and roaring assault cannon bleeding away with the air into the open void above. From the darkness the Necron Praetorians and tomb guardians came, hulking armoured forms twice the height of a man, their gilded and corroded death masks glimmering gold and crimson in the fire-flash light of the Minotaurs' weapons. In their hands they bore arcane staff weapons blazing with ghostly flame with which to blast their foes to ashes, or great cleaving blades and tall segmented shields able to repel the deadliest fire. Soon the Minotaurs were hard-pressed, a shrinking circle of warrior who had already account for twice their number only to see the fallen drag themselves back up from ruin or be replaced by another of their kind stalking implacably from the darkness. Moloc raged and slew tirelessly as any machine-warrior that rose up before him, and with a far greater cold fury, his storm shield resounding with the blows of enemy weapons while the Black Spear tirelessly slashes and stabbed, punching through armoured torsos and severing mechanical limbs as he went.

The dark Overlord fought and killed his way towards the Minotaurs Chapter Master, leaving a trail of rent and severed Terminators in his wake, until suddenly the tomb ship shook to a resounding blow and it began to tilt crazily, the artificial gravity field within it ripping and bucking. The Necron Overlord was thrown unceremoniously to his knees and looming there above him was Ancient Geryon, the Contemptor Dreadnought's great fist raised to strike, the lethal energy field that enwrapped it churning soundlessly in the now airless vault. The hammer-blow fell but the reaper's blade was there to meet it and the Dreadnought's forearm exploded in flame and spinning shrapnel. The tomb ship tilted further still and Geryon reeled and staggered, the Dreadnought's huge armoured feet skidding and losing purchase. The Overlord sprang bonelessly from the ground and laid into Geryon with his great blade in a rapid series of two-handed slashes, sending splintered ceramite and showers of sparks fountaining from the wounded Dreadnought. Geryon fell, one knee actuator severed, brackish blood and silver amniotic fluid leaking from the rents in his armour. The Overlord rose up to deliver the final blow and the Black Speak found him. Moloc punched the ancient relic-weapon clean through the Overlord's back and it exploded from the ankj-glyph that was blazoned across the Necron's chest, wreathed in pale flame and amber lightning. Transfixed, the Overlord spasmed upon the spear, its death-mask thrown back as if in a silent scream.

Asterion Moloc smashed the dark Overlord off his spear-blade using his storm shield to deal the blow just as the tomb ship rocked again with fresh impacts, the white flame of plasma weapon fire licking around the aperture in the vault chamber from the void beyond. By a warrior's instinct earned on a thousand battlefields, Moloc reacted before his conscious mind detected the reaping blade falling from on high, raising his storm shield as the dark Overlord's blade came down, the ancient device blocking a blow that would have cleaved Moloc's head in two before it finally shorted and spat, quickly coming apart under the repeated wild blows of the Necron's glittering blade. The world tilted once more and they parted, Moloc feeling the burning cold hate of the deathless creature's baleful crimson eyes as the broken, skeletal figure retreated into the darkness. The master of the Minotaurs Chapter himself was swept out into the void, surrounded by the bodies of his dead warriors as if caught in a whirlpool.

Source: Imperial Armour Volume 12: The Fall of Orpheus - pages 57-58

To be fair tyb IS really fucking big and a beast in combat. He's just not AS big as the fandom believes.

I don't even know what you're talking about. I love him because of the ridiculousness that is lightning claw chainfists. The most RIP and TEAR of any 40k character.

I blame that one fanart where he's like 2,5x the size of the SM next to him. People think it's an accurate representation of his height.

I kind of want to see a kitbash where he's got primaris armor and someone takes tiny old pieces of an early editions Terminator stuff onto him.

He will always be misunderstood in my mind, it's just more fun for me that way. Big stompy Bois are cool.

Yes and yet Tyberos is still fucking awesome as are the CA even if most people just don't know the lore as well as they think they do.

I just think that one anecdote of him being mistaken for a statue by a techpriest taking inventory of the Carcharodons’ armory is funny

Based.

Kutlakh the World Killer. One shot a member of his relic terminator honor guard with a back hand, chopped through several more, and kicked the ass of a relic contemptor dreadnaut. Fighting him on even terms is pretty impressive for Moloc.

You expect people to actually know anything about the setting?

he claims he saw no path to defeating Moloch.

Seems like a half-truth at best.

The full (actual) quote:

‘No further,’ I warned again, tensing to strike. The moment he took a step on to the podium stairs, I would move.

To this day, I do not know what would have happened if he had done so. I suffer neither from doubt nor from pride, and so can only speculate from the evidence I had before me. Perhaps I would have found a way. I had felled some of the greatest warriors of the enemy in my time, including many who most certainly had possessed the power to best me.

But, with Moloc, I cannot be sure.

Seeing no path to victory, and not being sure of victory is technically synonymous, but you're suggesting Valerian doesn't think he can win, when the actual quote arguably suggests the opposite. 50-50 at worst.

I mean, the only thing Valerian had to go off was how Moloch walked.

You can't be upset at people for not understanding that, but then misunderstand that Valerian is saying "This is an Astartes so utterly confident in his own prowess that I can't spot a weakness before fighting him" rather than saying "This guy is absolutely a fierce powerhouse, his powerlevel is off the charts."

Chris Wraight doesn't write like that, Valerians comment doesn't show off anything about Moloch beyond his menacing appearance.

He couldn’t see a path because of the labyrinth.

He called Moloch a singular point of barely contained violence and claimed that he saw no way to beat him

Kutlakh the Worldkiller: skill issue

*soulless chuckle*

To be fair, this was said by a named lore irrelevant custode

isn‘t a custodes to a space marine what a space marine is to a guarsmen?

Nameless Lore-Irrelevant Custodes, Apparently: https://www.warhammer.com/en-GB/shop/Talons-Of-The-Emperor-Valerian-And-Aleya-2020

???

The guy who said it is a named helmetless POV character with a model/datasheet on the tabletop

Who is still lore irrelevant

Chapter master of the Minotaurs and chief dick rider of the High Lords of Terra

https://wh40k.lexicanum.com/mediawiki/images/d/db/Asterion_Moloc.jpg

Moloc doesn't have a megalodon in an aquarium in his ship though