Altar of Dementia [Modern Horizons] Mordenkainen Its controller creates a tapped

Its controller creates a tapped Powerstone token

then draw that many cards and put one of them on the bottom of their library

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {B} Choose a card name

Set: Secret Lair Drop Series Type: Enchantment Rarity: Rare Cost: {2}{B} At the beginning of each player's upkeep

Set: The List Type: Enchantment Rarity: Rare Cost: {B} At the beginning of each end step

Altar of Dementia [Modern Horizons] Mordenkainen Its controller creates a tappedSet: 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