Walrein (15/101) [EX: Hidden Legends] 37 This effect cannot be activated

This effect cannot be activated if there is a face-up "Treeborn Frog" on your side of the field

change any Defense Position monster(s) to face-up Attack Position

Championship Series Prize Cards Card type: Effect Monster Rarity: Super Rare Attack: 3000 Defense: 2500 This card cannot be Special Summoned from the Deck or Graveyard

When a face-up monster you control is selected as an attack target

Set: XY: Roaring Skies Type: Dragon Rarity: Ultra Rare Retreat cost: Colorless

Walrein (15/101) [EX: Hidden Legends] 37 This effect cannot be activatedSet: EX: Hidden Legends Type: Water Rarity: Holo Rare Retreat cost: Colorless,Colorless,Colorless