Altar of Dementia [Tempest] The Legend of Blue Eyes White Dragon when your opponent activates a

when your opponent activates a monster effect (Quick Effect): You can detach 1 material from this card

this card negates the effects of your opponent's Spell

if you control no creatures

Set: Galactic Overlord Card type: Xyz/Effect Monster Rarity: Secret Rare Attack: 700 Defense: 700 3 Level 7 monsters You can detach 1 Xyz Material from this card

Set: EX: Delta Species Type: Grass Rarity: Rare Retreat cost: Colorless

Altar of Dementia [Tempest] The Legend of Blue Eyes White Dragon when your opponent activates aSet: Tempest Type: Artifact Rarity: Rare Cost: {2} Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power. "It is not that you will go mad. It is that you will beg for madness." Volrath