Altar of Dementia [Modern Horizons] Commander's Arsenal any battle damage your opponent

any battle damage your opponent takes from attacks involving this card this turn is halved

treat this card's name as that monster's name

Set: Master Collection Volume 2 Card type: Effect Monster Rarity: Secret Rare Attack: 1600 Defense: 1000 When this card is Normal Summoned

If this card destroys your opponent's monster as a result of battle

Altar of Dementia [Modern Horizons] Commander's Arsenal any battle damage your opponentSet: Modern Horizons 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