Brotherhood of the Fire Fist - Cardinal [LTGY-EN054] Secret Rare

2 Level 4 "Fire Fist" monsters
You can detach 2 Xyz Materials from this card, then target 2 “Fire Fist” / “Fire Formation” cards in your Graveyard and/or face-up on your side of the field, and 2 cards in your opponent’s Graveyard and/or face-up on their side of the field; shuffle those targets into the Deck. You can only use the effect of “Brotherhood of the Fire Fist – Cardinal” once per turn.