Dead God's Power

When this card enters the battlefield, sacrifice
target creature you control. You gain X life
counters, where X is the toughness of the
sacrificed creature. Whenever a creature you
control dies, you may remove one life counter and return that creature to your hand. You may
remove one life counter to put one creature from
your hand onto the battlefield without paying
mana. if the summoned creature were to die,
exile it instead.