Scion of Kozilek

Trample
When Scion of Kozilek enters the battlefield,
create a 1/1 colorless Scion creature token with "Sacrifice this creature: add {1}."
{3}: create a 1/1 colorless Scion creature token
with "Sacrifice this creature: add {1}."
{t}: Sacrifice six Scion creature tokens:
exile target creature.