All-Seeing Arbiter

{Lns}{center}{bold}Creature{/fontsize20}{Lns}Avatar{/bold}{/fontsize} 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 {Lns}among cards in your graveyard.