All-Seeing Arbiter

Flying
Whenever this creature enters 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.

EDHREC rank #11476

USD reference: $0.34 (~₱21.28) · Foil: $0.52 (~₱32.55)