Bujingi Crane – (2014 Mega-Tins) – (CT11-EN005) – (Super Rare)

During damage calculation (in either player’s turn), if a Beast-Warrior-Type “Bujin” monster you control battles an opponent’s monster: You can send this card from your hand to the Graveyard; the ATK of your monster becomes double its original ATK, during that damage calculation only.