
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.
Mages' Contest has 2 printings, first in Invasion (2000). EDHREC ranks it #10,861 among Commander cards. It appears most in Norin the Wary decks (733 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.