All-Seeing Arbiter [SNC - 34]

Flying
Whenever All-Seeing Arbiter enters the battlefield or attacks, draw two cards, then discard a card.
Whenever you discard a card, target creature an opponent controls gets -X/-0 until your next turn, where X is the number of different mana values among cards in your graveyard.

Rarity: Mythic

#: 34

Card Type: Creature, Creature — Avatar

Card Color: U

Casting Cost: {4}{U}{U}