Dorian, Prince of the Dead

Dorian, Prince of the Dead's power and toughness are equal to the number of Zombies
you control.

When Dorian, Prince of the Dead, attacks with Dani, Princess of Necromancy, Dorian gains flying until the end of the turn. Then return target creature from your graveyard with converted mana cost X or less to the battlefield tapped, where X is Dorian's power.