Bujingi Crane

Level 4 LIGHT/Winged Beast Effect Monster
1600 ATK / 300 DEF

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.

Rulings – Yugipedia

Printings:

Judgment of the Light: JOTL-EN020 (Rare) - 2013-08-08
2014 Mega-Tin Mega Pack: MP14-EN073 (Rare) - 2014-08-28
2014 Mega-Tins: CT11-EN005 (Super Rare) - 2014-08-28

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.21