Erase Tradition

Extract— When Erase Tradition enters the battlefield, create a 1/1 black and green Elf
creature token for each enchantment card in your graveyard.
Whenever you cast an Elf spell, mill cards equal
to its mana value.
{4}{b}{g}, Sacrifice Erase Tradition: Put a +1/+1
counter on each Elf creature you control. They
have menace until end of turn.