Poseidra, the Atlantean Dragon

[Sea Serpent/Effect]

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.

ATK/2800 DEF/1600

REALM OF THE SEA EMPEROR STRUCTURE DECK