Book of Eclipse (Quarter Century Secret Rare) [RA02-EN054] Quarter Century Secret Rare Dynasty you may discard a card

you may discard a card with cost 0

Set: Diamond & Pearl: Mysterious Treasures Type: Metal Rarity: Common Retreat cost: Colorless

If they choose war

by using this face-up card you control as the Xyz Material

the cost will be reduced by 1

Book of Eclipse (Quarter Century Secret Rare) [RA02-EN054] Quarter Century Secret Rare Dynasty you may discard a cardSet: Rarity Collection II (25th Anniversary Edition) Card type: Quick Play Spell Rarity: Quarter Century Secret Rare 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.