Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare 1st Edition This card can only be

This card can only be Special Summoned while "Toon World" is on your side of the field

You can only use this effect of "Archfiend Palabyrinth" once per turn

if you control a card(s) in your Spell & Trap Card Zone: You can Special Summon this card from your hand

all monsters your opponent currently controls lose 300 ATK for each

when an opponent's monster activates its effect (Quick Effect): You can detach 2 materials from this card

Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare 1st Edition This card can only beSet: 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.