Rush Warrior (Common)

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, your battling monster's ATK becomes double its current 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.