![Legendary Atlantean Tridon [LTGY-EN033] Common Normal Trap • Once per battle](https://cdn.shopify.com/s/files/1/0573/1106/8253/products/2a0c5919-cde5-5ab9-bfd8-46d36d37d9c8.png?v=1647364242)
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• Once per battle
You can only use the effect of "Mermail Abyssocea" once per turn
equip 1 appropriate LIGHT Machine-Type Union monster with a different name
If this card is excavated from the Deck and sent to the Graveyard by a card effect: You can target 1 "Sylvan" Spell/Trap Card in your Graveyard
Legendary Atlantean Tridon [LTGY-EN033] Common Normal Trap • Once per battleSet: Lord of the Tachyon Galaxy Card type: Effect Monster Rarity: Common Attack: 1600 Defense: 800 You can Tribute this card and 1 Sea Serpent Type monster; Special Summon 1 "Poseidra, the Atlantean Dragon" from your hand or Deck, then all monsters your opponent currently controls lose 300 ATK.