Enchant creature

Enchanted creature gets +3/+3 as long as it's a Zombie. Otherwise, it gets -3/-3.

Flying, trample

When Orcus, Prince of Undeath enters the battlefield, choose one —

• Each other creature gets -X/-X until end of turn. You lose X life.

• Return up to X target creature cards with total mana value X or less from your graveyard to the battlefield. They gain haste until end of turn.