Unnatural Born

As additional cost to cast this spell, sacrifice one or more creatures.

This spell can be casted from your graveyard.
When this creature is exiled, return it to it's owner's graveyard.

Unnatural Born enters with X +1/+1 counters on it equal to the sacrificed creatures total power.

Sacrifice a creature: Put a +1/+1 counter on Unnatural Born.