Mist Wurm [DT01-EN032] Ultra Rare WTR080-C and they cannot be destroyed

and they cannot be destroyed by your opponent's card effects

Set: Ancient Prophecy Card type: Effect Monster Rarity: Ultra Rare Attack: 1900 Defense: 1300 During each of your End Phases

put a -1 [Defense] counter on it when the combat chain closes

Set: Clash of Rebellions Card type: Xyz/Effect Monster Rarity: Ghost Rare Attack: 2800 Defense: 2400 2 Level 7 monsters Cannot be destroyed by card effects while it has Xyz Material

Mist Wurm [DT01-EN032] Ultra Rare WTR080-C and they cannot be destroyedSet: Duel Terminal 1 Card type: Synchro Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 1500 1 Tuner + 2 or more non Tuner monsters When this card is Synchro Summoned, return up to 3 cards your opponent controls to the hand.