Board Thread:Warhammer 40k General Discussion/@comment-86.159.94.118-20150805200234/@comment-86.173.133.71-20151229160803

He has even been killed by Eldred in a White Dwarf fluff piece, he'll be knocked off if they want him to be or he'll stay under the same whim.

It's the keeping him dead bit that is tricky. The Emperor was able to burn Horus from the warp so if someone is suitably able then i'm sure that would work well as same principal.