W.D. Gaster, Void Walker

Infect, Shroud, Deathtouch
When W.D. Gaster, Void Walker enters the battlefield, creatures you control gain +1/+3, Shroud, Deathtouch, And Infect
W.D. Gaster, Void Walker's Power And Toughness are equal to X, Where X is you devotion to black.