Book of Moon [SDDC-EN029] Common Xyz/Pendulum/Effect Monster When this card inflicts battle

When this card inflicts battle damage to your opponent: You can Special Summon 1 Level 5 or higher "Metaphys" monster from your Deck

The ATK of this card becomes the combined original ATK of the Tributed monsters

the ATK and DEF of all face-up monsters your opponent controls become half their current ATK and DEF (even if this card leaves the field)

then 1 face-up monster your opponent controls loses 800 ATK and DEF

if this card was Normal Summoned this turn (except during the Damage Step): You can make its ATK become double its original ATK

Book of Moon [SDDC-EN029] Common Xyz/Pendulum/Effect Monster When this card inflicts battleSet: Structure Deck: Dragons Collide Card type: Quick Play Spell Rarity: Common Attack: 0 Defense: 0 Target 1 face up monster on the field; change that target to face down Defense Position.