Abyss Dweller [DUDE-EN016] Ultra Rare SV20 if your opponent chose the

if your opponent chose the monster with a lower Level

You can only activate 1 "Fusion Destiny" per turn

Increase the ATK of this Special Summoned Fusion Monster by an amount equal to its original ATK

You can only Special Summon "Crusadia Draco" once per turn this way

Abyss Dweller [DUDE-EN016] Ultra Rare SV20 if your opponent chose theSet: Duel Devastator Card type: Xyz Effect Monster Rarity: Ultra Rare Attack: 1700 Defense: 1400 2 Level 4 monsters While this card has an Xyz Material attached that was originally WATER, all WATER monsters you control gain 500 ATK. Once per turn (Quick Effect): You can detach 1 Xyz Material from this card; your opponent cannot activate any card effects in their GY this turn.