The Book of the Law [FUEN-EN036] Secret Rare Cat Knight Set: Amonkhet Prerelease Promos Type:

Set: Amonkhet Prerelease Promos Type: Legendary Artifact Rarity: Rare Cost: {2} At the beginning of your end step

" —Cleph

Set: International Collectors' Edition Type: Instant Rarity: Rare Cost: {W} Cast this spell only during combat before blockers are declared

If Summoned this way

The Book of the Law [FUEN-EN036] Secret Rare Cat Knight Set: Amonkhet Prerelease Promos Type:Set: Fusion Enforcers Card type: Quick Play Spell Rarity: Secret Rare Tribute 1 "Invoked" monster; Special Summon 1 "Invoked" monster from your Extra Deck with a different original Attribute from that monster's. (This Special Summon is treated as a Fusion Summon.) You can only activate 1 "The Book of the Law" per turn.