Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare 1st Edition if this card was Special

if this card was Special Summoned: Send it to the Graveyard

during either player's turn

except this one

if this card battles a Pendulum Monster: Destroy both that monster and this card

all monsters your opponent currently controls lose 300 ATK for each

Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare 1st Edition if this card was SpecialSet: Structure Deck: Realm of the Sea Emperor Card type: Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 1600 You can Tribute 3 Level 3 or lower WATER monsters; Special Summon this card from your hand or Graveyard. When you do: Return all Spell and Trap Cards on the field to the hand, and if you do, if 3 or more cards are returned to the hand by this effect, all monsters your opponent currently controls lose 300 ATK for each.