Book of Eclipse [AP08-EN012] Super Rare ZEXAL World Duel Carnival Promos Once per turn (Quick Effect):

Once per turn (Quick Effect): You can pay 1000 LP

from face-up Attack Position to Defense Position

This Deck employs lots of Spellcasters and can make use of many of the existing Spellcaster-related cards

If this card in your possession is destroyed by an opponent's card effect and sent to your GY: You can Set 1 “Necrovalley” Spell/Trap directly from your Deck

Book of Eclipse [AP08-EN012] Super Rare ZEXAL World Duel Carnival Promos Once per turn (Quick Effect):Set: Astral Pack 8 Card type: Quick Play Spell Rarity: Super Rare Change all face up monsters on the field to face down Defense Position. During the End Phase of this turn, flip as many face down Defense Position monsters your opponent controls as possible face up, then your opponent draws cards equal to the number of monsters flipped face up by this effect.