Monster Harpoon 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.) Deal 2 to a unit at a battlefield. If you control a facedown card, deal 4 to it instead.
[迅捷]（可在你的回合或法术对决中打出。） 对战场上的一名单位造成2点伤害。如果你控制着一张正面朝下的卡牌，则改为对该单位造成4点伤害。