Surging Undercurrent

When played: If Abyss Herald: Wicked Torrents, who has this card equipped, has already triggered Watery Rebirth, then create 1 Curse of the Undercurrent on the opposing playing field.\nWhen Abyss Herald: Wicked Torrents, who has this card equipped, is defeated or triggers Watery Rebirth: Create 1 Curse of the Undercurrent on the opposing playing field.\n(You must have Abyss Herald: Wicked Torrents in your deck to add this card to your deck.)