Ziminiar's alter

{t} sacrifice 2 demons : create a 5/5 black demon token with flying.
{t} sacrifice 2 5/5 black demon tokens
With flying : create a 1/1 black demon with first strike, deathtouch , hexproof and has when this creature dies, search your library or graveyard for a card named ziminiar, the demon king and put him on the battlefield.