Childe of the Foul Legacy

+1: Childe of the Foul Legacy inflicts 1 damage to every creature. Repeat this process until a creature or creatures die.
+1: Childe of the Foul Legacy is a Black 7/7 Human Warrior with First Strike, Indestructable, Haste and Vigilance this turn. This ability has Flash.
-12: Childe of the Foul Legacy deals 10 damage to the creature on your opponent's field with the greatest power and to its owner.