Denizen of the Deep [Portal Second Age] Ultimate Edition 2 or a monster effect is

or a monster effect is activated: Pay 1500 LP

and it cannot be used as a Synchro Material Monster

Set: Black & White: Base Set Type: Lightning Rarity: Secret Rare Retreat cost: Colorless

Set: Sword & Shield: Fusion Strike Type: Psychic Rarity: Ultra Rare Retreat cost: 0

Set: Premium Gold: Return of the Bling Card type: Effect Monster Rarity: Gold Secret Rare Attack: 1200 Defense: 2500 You can Special Summon this card (from your hand) to your opponent's side of the field in Defense Position

Denizen of the Deep [Portal Second Age] Ultimate Edition 2 or a monster effect isSet: Portal Second Age Type: Creature Serpent Rarity: Rare Cost: {6}{U}{U} When Denizen of the Deep enters the battlefield, return each other creature you control to its owner's hand.