Nightmare Psyker

Whenever you cast an Instant or Sorcery
spell, you lose 1 life and create a 1/1 Black
Chaos Cultist creature.
{u}{b}, sacrifice Nightmare Psyker and five
other Cleric/Chaos Cultist creatures: search
your library for a Demon creature, put it
onto the battlefield under your control,
then shuffle your library.