Board Thread:Warhammer 40k General Discussion/@comment-82.196.41.196-20140826092920/@comment-25177957-20140828024947

It is said that Malcador gave the last of his psychic energy to the Anathema before he crumbled to ashes, which allowed him to give his final orders to Rogal Dorn before being interned into the Golden Throne. So Malcador can do no more for the Emperor. However it is possible that an extremely powerful psyker could be fed to the Emperor, which could bring him back. If Magus or Ahriman were sacrificed to the Emperor, for example.