Darth Caelitus, the Mercurial

Rank IV - Master
While you control this card, Zombie Being and Creature cards gain +1/+1.
Ritual of the Grave - {4}{p/b}{p/g}: Return up to three
target Being or Creature cards from any
Netherworld and put them on the field under
your control, but they gain Zombie in addition to
their other types, become black, and they can use {b} or {g} for their abilities instead.