Eldrad: Dead? Lost in the Warp? Heavens no, my cellphone ran out of battery. Sorry for worrying you kids, but there was nothing I could do.
Kaldor Draigo is effectively immortal and invincible, but Eldrad Ulthran gets killed by a rogue space station? Bologna.
Eldrad is higher on the 40k totem pole than the God Emperor. Yeah right.