Alazka, Demon Lord

Flying, trample, first strike
At the beginning of your combat, each opponents sacrifice a creature, put an Alazka counter on
Alazka for each creatures sacrificed this way.
Whenever Alazka deals damage to a creature,
if that creature dies, put an Alazka counter
on Alazka, Demon Lord.
At the beginning of your endstep, if there are
twenty or more Alazka counters on Alazka Demon Lord, you win the game