Narmikorat, the Necromacer

Flying
Creatures you control are undead, get -2/-2, and have trample. (If their power or toughness would be decreased, it's increased instead, and vice versa.)
{4}{b}{b}: Discard your hand. All creatures get -1/-1 until end of turn for each card discarded this way. When this ability finishes resolving, return up to one creature card from a graveyard to the battlefield under your control.