During damage calculation (in either player's turn), if a 'Warrior' Synchro Monster you control battles an opponent's monster: You can send this card from your hand to the Graveyard; double your battling monster's ATK during that damage calculation only. You can banish this card from your Graveyard, then target 1 'Synchron' monster in your Graveyard; add it to your hand. You can only use each effect of 'Rush Warrior' once per turn.
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