Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare Flip/Effect Monster and can not activate them

and can not activate them until their next turn after Setting them

except “Red Rose Dragon”

except "Red-Eyes Darkness Metal Dragon"

Set: World Superstars Card type: Effect Monster Rarity: Super Rare Attack: 1400 Defense: 0 Once per turn: You can change this card to face-down Defense Position

Set: Duelist Alliance Card type: Fusion/Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 2500 1 "Shaddoll" monster + 1 LIGHT monster Must first be Fusion Summoned

Poseidra, the Atlantean Dragon [SDRE-EN001] Ultra Rare Flip/Effect Monster and can not activate themSet: 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.