Gentlemen's Duel is a Riftbound card. Compare listings from Singapore Riftbound sellers on CardJio, then jio them on WhatsApp.
[Action] (Play on your turn or in showdowns.) Give a friendly unit +3 {might} this turn. Then choose an enemy unit. They deal damage equal to their Mights to each other.
[迅捷]（可在你的回合或法术对决中打出。） 让一名友方单位本回合内{might}+3。随后，选择一名敌方单位，让这两名单位相互以自身战力给对方造成伤害。