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 damage calculation only.
![Bujingi Crane [JOTL-EN020] Rare](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/ce884185-7726-51c1-8e03-ececed7371ef.png?v=1698552187&width=1445)