Yorick, Shepherd of Souls

Trample

When Yorick, Shepherd of Souls enters the battlefield, create The Maiden of The Mist, a legendary blue black Specter creature token with flying and "This creature's power and toughness are equal to the number of Specters you control"

Whenever a creature you or your opponent controls dies, create a 1/1 black Specter token with undying.