Battlin' Boxer Counterpunch (Common)

During the Damage Step of either player's turn, when a "Battlin' Boxer" monster you control is attacking or being attacked: You can banish this card from your hand or Graveyard, that monster gains 1000 ATK, until the end of this turn. You can only use the effect of "Battlin' Boxer Counterpunch" once per turn.