Ditto (3/62) [Fossil Unlimited] Fusion/Effect Monster if this card battles a

if this card battles a Special Summoned monster: You can make this card's ATK become double its current ATK until the end of the Damage Step

this Defense Position card cannot be destroyed by battle

The complete Ancient Guardians booster set contains 60-cards:

Set: XY: Flashfire Type: Fairy Rarity: Uncommon Retreat cost: Colorless

Set: Noble Knights of the Round Table Box Set Card type: Equip Spell Rarity: Platinum Rare Attack: 0 Defense: 0 You can only control 1 “Noble Arms of Destiny”

Ditto (3/62) [Fossil Unlimited] Fusion/Effect Monster if this card battles aSet: Fossil Unlimited Type: Colorless Rarity: Holo Rare Retreat cost: Colorless