Book of Eclipse is a Rare Spell Card card from Yu-Gi-Oh! (Tactical Masters, TAMA). Current market price: $0.25.
Rare
Tactical Masters (TAMA)
Card Text
Change all face-up monsters on the field to face-down Defense Position. During the End Phase of this turn, change as many face-down Defense Position monsters your opponent controls as possible to face-up Defense Position, then your opponent draws cards equal to the number of monsters changed face-up by this effect.
