Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)

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.")

Target creature gets +3/+1 until end of turn.

Exile the top card of your library. Until the end of your next turn, you may play that card.

If target creature has toughness 5 or greater, it gets +4/-4 until end of turn. Otherwise, it gets +4/-X until end of turn, where X is its toughness minus 1.

Nonbasic lands are Mountains.

Escalate {3} (Pay this cost for each mode chosen beyond the first.)

Choose one or both --

• Target creature gets +3/+0 until end of turn.

• Target creature gains first strike until end of turn.

Cumulative upkeep--Add {R}. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Target creature gets +3/+3 until end of turn.

Target creature gets +3/+1 and gains trample until end of turn.

Target attacking creature gets +3/+3 until end of turn. If it's an artifact creature, it gains trample until end of turn.

As Caged Sun enters the battlefield, choose a color.

Creatures you control of the chosen color get +1/+1.

Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

Enchant creature you control

When Cartouche of Zeal enters the battlefield, target creature can't block this turn.

Enchanted creature gets +1/+1 and has haste.

Target creature you control deals damage equal to its power to each other creature and each opponent.

+1: Exile the top card of your library. You may cast that card. If you don't, Chandra, Torch of Defiance deals 2 damage to each opponent.

+1: Add {R}{R}.

-3: Chandra, Torch of Defiance deals 4 damage to target creature.

-7: You get an emblem with "Whenever you cast a spell, this emblem deals 5 damage to any target."

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

If a source you control would deal damage to a permanent or player, it deals triple that damage instead.

Enchant creature

Enchanted creature gets +1/+0 for each Mountain you control and has first strike.

Add {R}{R}{R}.

Splice onto Arcane {1}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Flash

If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

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.")

You may sacrifice a Mountain rather than pay this spell's mana cost.

Target creature gets +X/+0 until end of turn, where X is the number of Mountains you control.

Enchant creature

When Dragon Mantle enters the battlefield, draw a card.

Enchanted creature has "{R}: This creature gets +1/+0 until end of turn."

Target creature you control gets +2/+0 until end of turn.

Overload {2}{R} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")

Target creature gains haste until end of turn.

Draw a card.

Draw two cards, then discard two cards.

Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

If a source you control would deal damage to a permanent or player, it deals triple that damage to that permanent or player instead.

Fire Diamond enters the battlefield tapped.

{T}: Add {R}.

Target creature gets +4/+0 until end of turn.

If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

When you cast this spell, copy it for each time you've cast your commander from the command zone this game. You may choose new targets for the copies.

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

As Gauntlet of Power enters the battlefield, choose a color.

Creatures of the chosen color get +1/+1.

Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.

If a creature you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Enchant creature

When Hammerhand enters the battlefield, target creature can't block this turn.

Enchanted creature gets +1/+1 and has haste.

Target creature gets +3/+2 until end of turn.

Jeska, Thrice Reborn enters the battlefield with a loyalty counter on her for each time you've cast a commander from the command zone this game.

0: Choose target creature. Until your next turn, if that creature would deal combat damage to one of your opponents, it deals triple that damage to that player instead.

-X: Jeska, Thrice Reborn deals X damage to each of up to three targets.

Jeska, Thrice Reborn can be your commander.

Partner

Whenever a commander you control deals combat damage to an opponent, it deals that much damage to each other opponent.

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

+1: Untap target Mountain. It becomes a 4/4 red Elemental creature until end of turn. It's still a land.

-2: Add {R} for each Mountain you control.

-5: You get an emblem with "Mountains you control have '{T}: This land deals 1 damage to any target.'"

+2: Search your library for a basic Mountain card, reveal it, put it into your hand, then shuffle.

-3: Koth, Fire of Resistance deals damage to target creature equal to the number of Mountains you control.

-7: You get an emblem with "Whenever a Mountain enters the battlefield under your control, this emblem deals 4 damage to any target."

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

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

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Each time target permanent would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead.

Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Add {R}{R}{R}.

Each player discards their hand, then draws seven cards.

Miracle {1}{R} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

You have no maximum hand size.

{T}: Add {C}.

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.)

Red spells you cast cost {1} less to cast.

Target attacking creature gets +3/+3 and gains trample until end of turn.

Whenever you cast a red spell, if Runaway Steam-Kin has fewer than three +1/+1 counters on it, put a +1/+1 counter on Runaway Steam-Kin.

Remove three +1/+1 counters from Runaway Steam-Kin: Add {R}{R}{R}.

Target creature gets +2/+1 and gains haste until end of turn. Scry 1.

Add {R}{R}{R}{R}{R}.

Untap target creature. After this main phase, there is an additional combat phase followed by an additional main phase.

Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

No more than one creature can attack each combat.

No more than one creature can block each combat.

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

Target creature you control deals damage equal to its power to any target.

Target creature gets +3/+1 until end of turn. If it's your turn, that creature gains trample until end of turn. Otherwise, it gains first strike until end of turn.

Target creature gets +3/+0 and gains first strike until end of turn.

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

Equip {1}

Target creature gains double strike until end of turn.

Ferocious -- That creature also gains trample until end of turn if you control a creature with power 4 or greater.

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

Draw two cards.

Target creature gets +3/+1 until end of turn. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Choose one --

• When you cast your next instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

• Target creature you control gains double strike until end of turn.

Target creature gets +3/+0 and gains haste until end of turn.

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.")

Double the power of target creature until end of 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}.

Valakut, the Molten Pinnacle enters the battlefield tapped.

Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target.

{T}: Add {R}.