Mordeo, Reaper Of Souls

Flying, Deathtouch, Wither, Corrupt, Partner
with Exos, Giver Of Life. As long as your
devotion
to black and blue is less than 7, this isn't a
creature.
Creatures you control have wither.
{7}{u/b}{t}Target player Exiles a creature From their graveyard. You may play that card at any time.