Zeorva, the Devourer

Splice onto Creature {1}{r}(As you cast a Creature spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card’s effects to that spell.) When this creature enters, it fights up to one target creature. {3}{g}, sacrifice a creature with power 4 or greater: If this creature is your commander, put it into your hand from the command zone. Discard a card.