Defender

When Akroan Horse enters the battlefield, an opponent gains control of it.

At the beginning of your upkeep, each opponent creates a 1/1 white Soldier creature token.

Whenever another permanent enters the battlefield under your control, each opponent mills a card.

Destroy all artifacts you don't control, then exile the top X cards of your library, where X is the number of artifacts that were put into graveyards from the battlefield this turn. You may put a creature card exiled this way onto the battlefield. It gains haste. Return it to your hand at the beginning of the next end step.

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

As an additional cost to cast this spell, discard a card.

Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

This spell costs {1} less to cast for each creature on the battlefield.

Blasphemous Act deals 13 damage to each creature.

Gain control of all permanents you own. (This effect lasts indefinitely.)

Cycling {2} ({2}, Discard this card: Draw a card.)

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

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.

Whenever a nonartifact permanent enters the battlefield under your control, you may return another permanent you control that shares a permanent type with it to its owner's hand.

Escalate {1} (Pay this cost for each mode chosen beyond the first.)

Choose one or more --

• Target player discards all the cards in their hand, then draws that many cards.

• Collective Defiance deals 4 damage to target creature.

• Collective Defiance deals 3 damage to target opponent or planeswalker.

Whenever an artifact, creature, or enchantment enters the battlefield, its controller chooses target permanent another player controls that shares a card type with it. Exchange control of those permanents.

Whenever a creature you control attacks, exile the top card of your library face down. (You can't look at it.)

{1}{R}, Discard your hand, Sacrifice Connecting the Dots: Put all cards exiled with Connecting the Dots into their owners' hands.

First strike

As an additional cost to cast red permanent spells, you may pay 2 life. Those spells cost {R} less to cast if you paid life this way. This effect reduces only the amount of red mana you pay.

Whenever you cast a red permanent spell, Defiler of Instinct deals 1 damage to any target.

If you control a commander, you may cast this spell without paying its mana cost.

You may choose new targets for target spell or ability.

As an additional cost to cast this spell, sacrifice an artifact or discard a card.

Draw two cards.

When Dockside Extortionist enters the battlefield, create X Treasure tokens, where X is the number of artifacts and enchantments your opponents control. (Treasure tokens are artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

{2}, {T}: You gain 5 life. Shuffle Elixir of Immortality and your graveyard into their owner's library.

Whenever Etali, Primal Storm attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs.

Search your library for a card, put that card into your hand, discard a card at random, then shuffle.

Red creatures get +1/+1.

Whenever a Mountain is tapped for mana, its controller adds an additional {R}.

Whenever a nontoken creature enters the battlefield, if Genesis Chamber is untapped, that creature's controller creates a 1/1 colorless Myr artifact creature token.

Double strike

Whenever another legendary creature enters the battlefield under your control, put a +1/+1 counter on Gimli of the Glittering Caves.

Whenever Gimli deals combat damage to a player, create a Treasure token.

{R}, Return Grinning Ignus to its owner's hand: Add {C}{C}{R}. Activate only as a sorcery.

Whenever a spell or ability is put onto the stack, if it has a single target, reselect its target at random. (Select from among all legal targets.)

For each player, choose target nonenchantment, nonland permanent that player controls. Those permanents' owners shuffle them into their libraries. Each player who controlled one of those permanents exiles cards from the top of their library until they exile a nonland card, then puts the rest on the bottom of their library in a random order. Each player may cast the nonland card they exiled without paying its mana cost.

Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, Harsh Mentor deals 2 damage to that player.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

{T}: Draw two cards. Target opponent gains control of Humble Defector. Activate only during your turn.

Untap all creatures and gain control of them until end of turn. They gain haste until end of turn.

Choose one. If you control a commander as you cast this spell, you may choose both instead.

• Add {R} for each card in target opponent's hand.

• Exile the top three cards of your library. You may play them this turn.

{T}: Add {C}.

{1}{R}, {T}: Create a 0/1 red Kobold creature token named Kobolds of Kher Keep.

Berzerker -- Khârn the Betrayer attacks or blocks each combat if able.

Sigil of Corruption -- When you lose control of Khârn the Betrayer, draw two cards.

The Betrayer -- If damage would be dealt to Khârn the Betrayer, prevent that damage and an opponent of your choice gains control of it.

Haste

{T}, Sacrifice an artifact: Put a +1/+1 counter on each Goblin you control.

Whenever an artifact is put into a graveyard from the battlefield, you may pay {R}. If you do, create a 1/1 red Goblin creature token. It gains haste until end of turn.

{T}: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Haste

Lieutenant -- At the beginning of combat on your turn, if you control your commander, create a 1/1 colorless Thopter artifact creature token with flying. That token gains haste until end of turn.

Nonbasic lands are Mountains.

{1}{R}, {T}, Sacrifice Magus of the Wheel: Each player discards their hand, then draws seven cards.

Whenever an opponent draws a card, you may pay {1}. If you do, draw a card.

({T}: Add {R}.)

({T}: Add {R}.)

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({T}: Add {R}.)

Flash

When Mysterious Stranger enters the battlefield, for each graveyard with an instant or sorcery card in it, exile target instant or sorcery card from that graveyard. If two or more cards are exiled this way, choose one of them at random and copy it. You may cast the copy without paying its mana cost.

When a player casts a spell or a creature attacks, exile Norin the Wary. Return it to the battlefield under its owner's control at the beginning of the next end step.

Whenever a creature enters the battlefield, that creature's controller may have it deal damage equal to its power to any target of their choice.

If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

At the beginning of your upkeep, flip a coin. If you lose the flip, sacrifice Planar Chaos.

Whenever a player casts a spell, that player flips a coin. If they lose the flip, counter that spell.

If a player would draw a card, that player skips that draw instead.

At the beginning of each end step, each player sacrifices a permanent unless they discard a card.

Whenever a player casts a spell from their hand, that player exiles it, then exiles cards from the top of their library until they exile a card that shares a card type with it. That player may cast that card without paying its mana cost. Then they put all cards exiled with Possibility Storm on the bottom of their library in a random order.

Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, you may cast that card without paying its mana cost if the two spells have the same mana value.

Each opponent secretly chooses silence or snitch, then the choices are revealed. If each opponent chose silence, Prisoner's Dilemma deals 4 damage to each of them. If each opponent chose snitch, Prisoner's Dilemma deals 8 damage to each of them. Otherwise, Prisoner's Dilemma deals 12 damage to each opponent who chose silence.

Flashback {5}{R}{R}

Flash

When Radiant Performer enters the battlefield, if you cast it from your hand, choose target spell or ability that targets only a single permanent or player. Copy that spell or ability for each other permanent or player the spell or ability could target. Each copy targets a different one of those permanents and players.

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)

Copy target instant or sorcery spell. You may choose new targets for the copy.

{T}: Add one mana of any color.

Tap an untapped legendary creature you control: Add one mana of any color.

You have no maximum hand size.

{T}: Add {C}.

Spree (Choose one or more additional costs.)

+ {1} -- Copy target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for the copy.

+ {1} -- Change the target of target spell or ability with a single target.

Copy target instant or sorcery spell. You may choose new targets for the copy.

First strike, menace, trample

Partner (You can have two commanders if both have partner.)

For each nonland permanent, choose a player at random. Then each player gains control of each permanent for which they were chosen. Untap those permanents.

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

Create X 1/1 black Rat creature tokens with "This creature can't block." Creatures you control gain haste until end of turn.

You may cast Squee, the Immortal from your graveyard or from exile.

At the beginning of each player's draw step, that player puts the cards in their hand on the bottom of their library in any order, then draws that many cards.

Tome of Legends enters the battlefield with a page counter on it.

Whenever your commander enters the battlefield or attacks, put a page counter on Tome of Legends.

{1}, {T}, Remove a page counter from Tome of Legends: Draw a card.

Whenever an opponent taps an artifact for mana, gain control of that artifact until the end of your next turn.

Put any number of cards from your hand on the bottom of your library, then draw that many cards plus one.

Valakut Stoneforge enters the battlefield tapped.

{T}: Add {R}.

Landfall -- Whenever a land enters the battlefield under your control, exile the top card of your library. You may play that card for as long as it remains exiled.

At the beginning of your end step, if there are cards exiled with Valakut Exploration, put them into their owner's graveyard, then Valakut Exploration deals that much damage to each opponent.

Destroy target artifact you don't control.

Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Each player discards their hand, then draws seven cards.

Each player secretly chooses a number 0 or greater, then all players reveal those numbers simultaneously and determine the highest and lowest numbers revealed this way. Wheel of Misfortune deals damage equal to the highest number to each player who chose that number. Each player who didn't choose the lowest number discards their hand, then draws seven cards.

At the beginning of each player's upkeep, that player reveals a card at random from their hand. If it's a land card, the player puts it onto the battlefield. Otherwise, the player casts it without paying its mana cost if able.

Choose one --

• Break Their Chains -- Destroy target artifact.

• Interrogate Them -- Exile the top three cards of target opponent's library. Choose one of them. Until the end of your next turn, you may play that card, and you may spend mana as though it were mana of any color to cast it.