Nistro vs The Sparrow: A Yu-Gi-Oh Duel

Heroic Heros!

Heroic Champion Excalibur
Effect:
2 Level 4 Warrior-Type monsters
This card cannot declare an attack unless your Life Points are 500 or less. When this card battles: You can detach all Xyz Materials from this card; this card's ATK is doubled, until the end of the Battle Phase.

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