Demothf, the destructor

: At the beginning of your end step and when your opponents cast a creature each opponent takes 5 and sacrifices a creature.
+2: Create 6 4/1 red demon creature's that have this card can't be blocked and sacrifice a creature for every player then proliferate.
-8: Create 1 red demon, exile the top 8 card's of your library and you may play them this turn each opponent's loses 6 health.