Gisa's Imperishable Hoard

Nonlegendary creatures you control have haste
and decayed. They must attack each combat if
able. They're black Zombies in addition to other
types.
Legendary creatures you control have "At the
beginning of your upkeep and whenever this
creature dies, return up to three target
nonlegendnary creature cards with total mana
value 4 or less from your graveyard to the
battlefield."