When your opponent would Normal or Special Summon a monster(s), while you control "Atlantis, City of the Sea Dragon": Negate the Summon, and if you do, destroy that monster(s), then if you control a WATER Link Monster, you can destroy all monsters on the field, except WATER monsters. You can banish this card from your GY and send 1 face-up "Umi" you control to the GY, then target 1 monster your opponent controls; send it to the GY. You can only use 1 "Daedalus Maelstrom" effect per turn, and only once that turn.
![Daedalus Maelstrom [BETB-EN076] Common | Exor Games Bridgewater](http://exor-games-bridgewater.myshopify.com/cdn/shop/files/ygo_placeholder_e4244e0f-67ad-443d-b185-868dfdf04345.png?v=1790375262)
