"It is not that you will go mad. It is that you will beg for madness."
—Volrath

The Brothers' War Retro Artifacts

Altar of Dementia

Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.

"My dreams have brought more visions from our master: an altar, exquisite and perfect. We must build it at once."
—Writings of Artonac, priest of Gix

Modern Horizons

Sacrifice a creature: Target player puts a number of cards equal to the sacrificed creature's power from the top of their library into their graveyard.

Conspiracy

Sacrifice a creature: Target player puts a number of cards equal to the sacrificed creature's power from the top of his or her library into his or her graveyard.

Tempest

Sacrifice a creature: Target player puts a number of cards equal to that creature's power from the top of his or her library into his or her graveyard.