Mages' Contest [The List] Planechase Scholars say that arbiters exist

Scholars say that arbiters exist on every world

the Coalition Type: Basic Land — Island Rarity: Common ({T}: Add {U}

Set: Fifth Edition Type: Creature — Orc Rarity: Rare Cost: {4}{R} Whenever Orcish Squatters attacks and isn't blocked

Pinch the Os

Mages' Contest [The List] Planechase Scholars say that arbiters existSet: The List Type: Instant Rarity: Rare Cost: {1}{R}{R} You and target spell's controller bid life. You start the bidding with a bid of 1. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid. If you win the bidding, counter that spell.