Altar of Dementia

Altar of Dementia (The Brothers' War Retro Artifacts)
Brom

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

Altar of Dementia (Conspiracy)
Brom

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

Altar of Dementia (The Brothers' War Retro Artifacts)
Isis

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

Altar of Dementia (The Brothers' War Retro Artifacts)
Isis

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

Altar of Dementia (Tempest)
Brom

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

Altar of Dementia (Modern Horizons)
Brom

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

Hidetsugu, Devouring Chaos (Kamigawa: Neon Dynasty)
Isis

{B}, Sacrifice a creature: Scry 2. {2}{R}, {T}: Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu deals damage equal to the exiled card's mana value to any target.

Rot Like the Scum You Are (Duskmourn: House of Horror Commander)
Isis

When you set this scheme in motion, create a 2/2 green Ooze creature token, then put a number of +1/+1 counters on it equal to the number of lands your opponents control.

"Defy me, and you will dissolve inch by screaming inch."

Gift of Wrath (Kamigawa: Neon Dynasty)
Isis

Enchant artifact or creature As long as enchanted permanent is a creature, it gets +2/+2 and has menace. (It can't be blocked except by two or more creatures.) When this Aura leaves the battlefield, create a 2/2 red Spirit creature token with menace.

Unseal the Necropolis (The List)
Isis

Each player mills three cards. Then you return up to two creature cards from your graveyard to your hand. (To mill three cards, a player puts the top three cards of their library into their graveyard.)

On Amonkhet, Phyrexia found a ready-made army of horrors waiting for a new master.

Enduring Tenacity (Duskmourn: House of Horror Promos)
Isis

Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Hidetsugu, Devouring Chaos (Kamigawa: Neon Dynasty)
Isis

{B}, Sacrifice a creature: Scry 2. {2}{R}, {T}: Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu deals damage equal to the exiled card's mana value to any target.

Hostile Takeover (Streets of New Capenna)
Isis

Up to one target creature has base power and toughness 1/1 until end of turn. Up to one other target creature has base power and toughness 4/4 until end of turn. Then Hostile Takeover deals 3 damage to each creature.

Altar of Dementia (The Brothers' War Retro Artifacts)
Isis

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

Arvinox, the Mind Flail (Secret Lair Drop)
Isis

Arvinox isn't a creature unless you control three or more permanents you don't own. At the beginning of your end step, exile the bottom card of each opponent's library face down. For as long as those cards remain exiled, you may look at them, you may cast permanent spells from among them, and you may spend mana as though it were mana of any color to cast those spells.

Enduring Tenacity (Duskmourn: House of Horror)
Isis

Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Voidslime (Ravnica Remastered)
Isis

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

"It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary." —Simic research notes

Enduring Tenacity (Duskmourn: House of Horror)
Isis

Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Cyclonic Rift (Ravnica Remastered)
Isis

Return target nonland permanent you don't control to its owner's hand. Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

The Izzet specialize in unnatural disaster.

Voidslime (Ravnica Remastered)
Isis

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

"It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary." —Simic research notes

Psychosis Crawler (The Brothers' War Retro Artifacts)
Isis

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

"Perhaps drawing the impossible monster will lessen the burden my memory must bear." —Jarsyl, diary

Cyclonic Rift (Ravnica Remastered)
Isis

Return target nonland permanent you don't control to its owner's hand. Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

The Izzet specialize in unnatural disaster.

Arachnoid Adaptation (March of the Machine)
Isis

Target creature gets +2/+2 and gains reach until end of turn. Untap it.

"Deploy the blightwidows. Rankle's pests should make for a delicious meal." —Ayara, Furnace Queen

Altar of Dementia (The Brothers' War Retro Artifacts)
Isis

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

Hostile Takeover (Streets of New Capenna)
Isis

Up to one target creature has base power and toughness 1/1 until end of turn. Up to one other target creature has base power and toughness 4/4 until end of turn. Then Hostile Takeover deals 3 damage to each creature.

Cyclonic Rift (Ravnica Remastered)
Isis

Return target nonland permanent you don't control to its owner's hand. Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

The Izzet specialize in unnatural disaster.

Echoes of Eternity (Modern Horizons 3)
Isis

If a triggered ability of a colorless spell you control or another colorless permanent you control triggers, that ability triggers an additional time. Whenever you cast a colorless spell, copy it. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Niv-Mizzet, Supreme (March of the Machine: The Aftermath)
Isis

Flying, hexproof from monocolored Each instant and sorcery card in your graveyard that's exactly two colors has jump-start. (You may cast that card from your graveyard by discarding a card in addition to paying its other costs. Then exile it.)

Flare of Duplication (Modern Horizons 3)
Isis

You may sacrifice a nontoken red creature rather than pay this spell's mana cost. Copy target instant or sorcery spell. You may choose new targets for the copy.

Myrkul, Lord of Bones (Commander Legends: Battle for Baldur's Gate)
Isis

As long as your life total is less than or equal to half your starting life total, Myrkul has indestructible. Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that card, except it's an enchantment and loses all other card types.

Myrkul, Lord of Bones (Battle for Baldur's Gate Promos)
Isis

As long as your life total is less than or equal to half your starting life total, Myrkul has indestructible. Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that card, except it's an enchantment and loses all other card types.

Hidetsugu, Devouring Chaos (Kamigawa: Neon Dynasty Promos)
Isis

{B}, Sacrifice a creature: Scry 2. {2}{R}, {T}: Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu deals damage equal to the exiled card's mana value to any target.

Voidslime (Ravnica Remastered)
Isis

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

"It is technically an ooze, but its lifespan measures only seconds. In that short time, its appetite for magic is extraordinary." —Simic research notes

Negate (Dominaria United)
Isis

Counter target noncreature spell.

"It's frustrating, isn't it, to be so weak and ineffectual? Don't worry, you'll be *compleat* soon enough." —Rona

Free from Flesh (Phyrexia: All Will Be One)
Isis

Target creature gets +2/+2 until end of turn. Put two oil counters on it.

He finally understood that phyresis was not an ending, but a new, perfect beginning.

Enduring Tenacity (Duskmourn: House of Horror Promos)
Isis

Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Hidetsugu, Devouring Chaos (Kamigawa: Neon Dynasty Promos)
Isis

{B}, Sacrifice a creature: Scry 2. {2}{R}, {T}: Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu deals damage equal to the exiled card's mana value to any target.

Unseal the Necropolis (March of the Machine)
Isis

Each player mills three cards. Then you return up to two creature cards from your graveyard to your hand. (To mill three cards, a player puts the top three cards of their library into their graveyard.)

On Amonkhet, Phyrexia found a ready-made army of horrors waiting for a new master.

Echoes of Eternity (Modern Horizons 3 Promos)
Isis

If a triggered ability of a colorless spell you control or another colorless permanent you control triggers, that ability triggers an additional time. Whenever you cast a colorless spell, copy it. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

Murder (Murders at Karlov Manor)
Isis

Destroy target creature.

Laughter and conversation trailed off as the revelers gathered around Zegana's body. Three things quickly became clear: it was a murder, the killer was likely among them, and Teysa's party was definitely over.

Niv-Mizzet, Supreme (March of the Machine: The Aftermath)
Isis

Flying, hexproof from monocolored Each instant and sorcery card in your graveyard that's exactly two colors has jump-start. (You may cast that card from your graveyard by discarding a card in addition to paying its other costs. Then exile it.)

Necrosynthesis (Innistrad: Double Feature)
Isis

Enchant creature Enchanted creature has "Whenever another creature dies, put a +1/+1 counter on this creature." When enchanted creature dies, look at the top X cards of your library, where X is its power. Put one of those cards into your hand and the rest on the bottom of your library in a random order.

Necrosynthesis (Innistrad: Midnight Hunt)
Isis

Enchant creature Enchanted creature has "Whenever another creature dies, put a +1/+1 counter on this creature." When enchanted creature dies, look at the top X cards of your library, where X is its power. Put one of those cards into your hand and the rest on the bottom of your library in a random order.

Psychosis Crawler (The Brothers' War Retro Artifacts)
Isis

Psychosis Crawler's power and toughness are each equal to the number of cards in your hand. Whenever you draw a card, each opponent loses 1 life.

"Perhaps drawing the impossible monster will lessen the burden my memory must bear." —Jarsyl, diary