Whenever an opponent casts a creature spell, Aether Sting deals 1 damage to that player.

Whenever you cast a noncreature spell, Firebrand Archer deals 1 damage to each opponent.

Whenever you cast a noncreature spell, Kessig Flamebreather deals 1 damage to each opponent.

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

At the beginning of each player's upkeep, Roiling Vortex deals 1 damage to them. Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player. {R}: Your opponents can't gain life this turn.

Flying Whenever a player casts a spell, they lose 1 life for each spell they've cast this turn.

First strike, trample Whenever Sardian Avenger attacks, it gets +X/+0 until end of turn, where X is the number of artifacts your opponents control. Whenever an artifact an opponent controls is put into a graveyard from the battlefield, Sardian Avenger deals 1 damage to that player.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Whenever a creature enters the battlefield under an opponent's control, you may have that player lose 1 life.

Spectacle {R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

At the beginning of each player's draw step, that player draws an additional card. Whenever a player draws a card, Spiteful Visions deals 1 damage to that player.

Menace At the beginning of your upkeep, each player draws a card and loses 1 life.

At the beginning of your upkeep, exile the top card of your library. During your turn, if an opponent lost life this turn, you may play lands and cast spells from among cards exiled with Theater of Horrors. {3}{R}: Theater of Horrors deals 1 damage to target opponent or planeswalker.

The first spell you cast from exile each turn has cascade. (When you cast your first spell from exile, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

{T}: Add one mana of any color in your commander's color identity.

As Foreboding Ruins enters the battlefield, you may reveal a Swamp or Mountain card from your hand. If you don't, Foreboding Ruins enters the battlefield tapped. {T}: Add {B} or {R}.

({T}: Add {R}.)

Piranha Marsh enters the battlefield tapped. When Piranha Marsh enters the battlefield, target player loses 1 life. {T}: Add {B}.

Rakdos Carnarium enters the battlefield tapped. When Rakdos Carnarium enters the battlefield, return a land you control to its owner's hand. {T}: Add {B}{R}.

({T}: Add {B} or {R}.) Smoldering Marsh enters the battlefield tapped unless you control two or more basic lands.

When Sunscorched Desert enters the battlefield, it deals 1 damage to target player or planeswalker. {T}: Add {C}.

At the beginning of each player's upkeep, Barbed Wire deals 1 damage to that player. {2}: Prevent the next 1 damage that would be dealt by Barbed Wire this turn.

{1}, {T}: Blisterspit Gremlin deals 1 damage to each opponent. Whenever you cast a noncreature spell, untap Blisterspit Gremlin.

{T}: Cinder Pyromancer deals 1 damage to target player or planeswalker. Whenever you cast a red spell, you may untap Cinder Pyromancer.

{T}: Goblin Fireslinger deals 1 damage to target player or planeswalker.

Haste Whenever you cast a noncreature spell, put an oil counter on Sawblade Scamp. {T}, Remove an oil counter from Sawblade Scamp: It deals 1 damage to each opponent.

Flying Whenever a player casts a nonblack spell, that player loses 1 life.

Until end of turn, target creature gets +1/+0 and gains indestructible. (Damage and effects that say "destroy" don't destroy it.)

Flash Enchant creature At the beginning of your upkeep, you lose 1 life. {0}: Regenerate enchanted creature.

This spell costs {3} less to cast if you control a creature with power 4 or greater. Change the target of target spell or ability with a single target.

Enchant creature or planeswalker you control When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.

Choose one — • Put a +1/+1 counter on target creature. • Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Target creature gets +1/+0 and gains lifelink and indestructible until end of turn. (Damage dealt by that creature also causes its controller to gain that much life, and it can't be destroyed by damage or effects that say "destroy.")

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.) Equip {1}

{T}: Add one mana of any color in your commander's color identity.

Charcoal Diamond enters the battlefield tapped. {T}: Add {B}.

Add {B}{B}{B}.

{T}: Add one mana of any color that a land an opponent controls could produce.

Fire Diamond enters the battlefield tapped. {T}: Add {R}.

{T}: Add {C}. {T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.

Add {R} for each tapped land your opponents control.

{T}: Add {C}. {1}, {T}, Sacrifice Mind Stone: Draw a card.

Menace Whenever a player casts their first spell each turn, they create a Treasure token. Whenever an artifact an opponent controls is put into a graveyard from the battlefield, Pain Distributor deals 1 damage to that player.

{1}, {T}: Add {B}{R}.

{T}: Add {C}{C}.

Destroy target artifact, creature, or planeswalker.

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

This spell costs {X} less to cast, where X is the total amount of noncombat damage dealt to your opponents this turn. Trample Whenever a source you control deals noncombat damage to an opponent, Chandra's Incinerator deals that much damage to target creature or planeswalker that player controls.

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent's mana value.

Grapeshot deals 1 damage to any target. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Whenever an opponent draws a card, Ob Nixilis, the Hate-Twisted deals 1 damage to that player. −2: Destroy target creature. Its controller draws two cards.

{4}, {T}: Put a fate counter on target permanent. {5}, {T}, Sacrifice Oblivion Stone: Destroy each nonland permanent without a fate counter on it, then remove all fate counters from all permanents.

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence. {B}: Pestilence deals 1 damage to each creature and each player.

Choose one — • Exile target player's graveyard. • Destroy target artifact. • Each creature deals 1 damage to its controller.

Whenever you put one or more counters on a permanent or player, All Will Be One deals that much damage to target opponent, creature an opponent controls, or planeswalker an opponent controls.