If a ""Fire Fist"" monster you control attacks or is attacked, during damage calculation (in either player's turn): You can send 1 face-up ""Fire Formation"" Spell/Trap Card you control and 1 ""Fire Fist"" monster from your hand to the Graveyard once per battle; your attacking/attacked monster gains ATK equal to the original ATK of the monster sent to the Graveyard, during damage calculation only.
![Brotherhood of the Fire Fist - Rhino [Lord of the Tachyon Galaxy] [LTGY-EN028] | Gear Gaming Bentonville](http://bentonville.geargamingstore.com/cdn/shop/products/68122_200w.jpg?v=1570625830)
