All-Seeing Arbiter

全视仲裁者 (All-Seeing Arbiter) (zhs)

Creature - Avatar | Power/Toughness: 5 / 4 (CMC 6)
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.