[@Sophrus] ...that is also a possible option. I still need to come up with Oph's other stuff, but that is a plausible mechanic for necessitating the Golden Throne's use as a sacrifice nevertheless. Now I need something for him to sacrifice himself about, and with a large proportion of one of his Legion's Chapters planned to go full Heretic anyway, he might well feel exceptionally guilty about that and any given failure to warn the Emperor of Chaotic activity in his Primarchs, amongst other things. So there's all that for me to consider.