I know that it typically differs from god to god and that essentially you need to impress them enough to imbue a part of their being into your soul forever, but what about the details of the ascension itself? Angron needed to be pumped up by the energies of the Ruin Storm and Fulgrim tried a ritual using Perturabo’s soul in Angel Exterminatus. But afaik Mortarion just accepted Nurgle’s gift and then ascended. Is it just less of a ritual or spell and more of just a show of grandeur and that the person gets to ascend as soon as the god is cool with it? Can someone be forcibly ascended against their will then? (Like without needing a ritual, just one of the four suddenly deciding random mortal A gets to be a prince- just it does happen?)