Sudden Storm is a Riftbound card. Compare listings from Singapore Riftbound sellers on CardJio, then jio them on WhatsApp.
[Hidden] (Hide now for {rune} to react with later for {0}.) [Action] (Play on your turn or in showdowns.) Deal 2 to a unit at a battlefield. If it's attacking, deal 4 to it instead.
[待命]（支付{rune}正面朝下放置此牌，之后可支付{0}将其当作反应牌打出。） [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。如果它是进攻方，则改为造成4点伤害。