Merocrut, Titan of the Altar

When you cast Merocrut, You may sacrifice any
number of creatures.
Whenever Merocrut attacks, you may create a
token copy of any creature in your graveyard
and put it on the battlefield tapped and
attacking, exile it at the end of turn.
Whenever you sacrifice a creature, you may
pay 3 life, if you do, return the sacrificed
creature to the battlefield.