Wither Boss

when Wither Boss enters to the battlefield, each
opponent sacrifices a creature.
Flying, Deathtouch
{b}{b}{t}: Create two 1\1 Wither Blast token
with Flying.
{b}, sacrifice a Wither Blast: Wither Boss gets
+1\+1 for
each Wither Blast you sacrificed.
{b}{1}, Exile Wither Boss from your graveyard:
destroy target creature.