Dio Brando, Vampire Lord

When Dio Brando, Vampire Lord enters the battlefield, you may return target creature card
from your graveyard to the battlefield. That creature
is a black Zombie in addition to it's other colors and types.
At the beginning of your end step, if you control both Dio Brando, Vampire Lord and Joseph Joestar,
exile them, then meld them into Dio, Reborn Nightmare.