The Book of the Law [FUEN-EN036] Secret Rare U-MON187-RF when a card or effect

when a card or effect is activated: You can negate the activation and destroy it

If it's a 'non-attack' action card

Set: Promo Finish: Cold Foil Type: Hero Rarity: Promo Class: Mechanologist Life: 40 Intellect: 4 You may start the game with a Mechanologist item with cost [2 Resource] or less in the arena

Set: Uprising Edition: Unlimited Finish: Cold Foil Type: Action Subtype: Invocation Rarity: Marvel Class: Draconic Illusionist Cost: 0 Power: 3 Life: 2 Transform target ash you control into Cromai

This card's Normal Summon cannot be negated

The Book of the Law [FUEN-EN036] Secret Rare U-MON187-RF when a card or effectSet: 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.