Fire Souls

Haste. (This creature can attack and {t} as soon as
it comes under your control.)
When Fire Souls enter the battlefield, it gets
+1/0 for each creature in your graveyard.
If there are no creatures in your graveyard,
put three 1/1 red Elemental creatures
tokens onto the battlefield.
At the beginning of the end step, sacrifice Fire
Souls.