Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)
{1}{R}{R}
Aether Membrane
Creature - Wall
Defender; reach (This creature can block creatures with flying.)
Whenever Aether Membrane blocks a creature, return that creature to its owner's hand at end of combat.
0 /
5
{3}{R}
Anger
Creature - Incarnation
Haste
As long as Anger is in your graveyard and you control a Mountain, creatures you control have haste.
2 /
2
{1}{R}{R}{R}
Awaken the Ancient
Enchantment - Aura
Enchant Mountain
Enchanted Mountain is a 7/7 red Giant creature with haste. It's still a land.
{6}{R}{R}
Bloodfire Colossus
Creature - Giant
{R}, Sacrifice Bloodfire Colossus: It deals 6 damage to each creature and each player.
6 /
6
{2}{R}{R}
Bloodfire Kavu
Creature - Kavu
{R}, Sacrifice Bloodfire Kavu: It deals 2 damage to each creature.
2 /
2
{2}{R}{R}
Chandra's Outrage
Instant
Chandra's Outrage deals 4 damage to target creature and 2 damage to that creature's controller.
{3}{R}
Cosi's Ravager
Creature - Elemental
Landfall -- Whenever a land enters the battlefield under your control, you may have Cosi's Ravager deal 1 damage to target player or planeswalker.
2 /
2
{2}{R}
Downhill Charge
Instant
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.
{5}{R}
Earth Servant
Creature - Elemental
Earth Servant gets +0/+1 for each Mountain you control.
4 /
4
{1}{R}{R}
Fiery Hellhound
Creature - Elemental Dog
{R}: Fiery Hellhound gets +1/+0 until end of turn.
2 /
2
{1}{R}{R}
Fiery Hellhound
Creature - Elemental Dog
{R}: Fiery Hellhound gets +1/+0 until end of turn.
2 /
2
{3}{R}{R}
Geyser Glider
Creature - Elemental Beast
Landfall -- Whenever a land enters the battlefield under your control, Geyser Glider gains flying until end of turn.
4 /
4
{4}{R}{R}
Greater Stone Spirit
Creature - Elemental Spirit
Greater Stone Spirit can't be blocked by creatures with flying.
{2}{R}: Until end of turn, target creature gets +0/+2 and gains "{R}: This creature gets +1/+0 until end of turn."
4 /
4
{1}{R}{R}
Hammer of Purphoros
Legendary Enchantment Artifact
Creatures you control have haste.
{2}{R}, {T}, Sacrifice a land: Create a 3/3 colorless Golem enchantment artifact creature token.
{1}{R}
Impetuous Sunchaser
Creature - Human Soldier
Flying, haste
Impetuous Sunchaser attacks each combat if able.
1 /
1
{5}{R}
Jaws of Stone
Sorcery
Jaws of Stone deals X damage divided as you choose among any number of targets, where X is the number of Mountains you control as you cast this spell.
{2}
Journeyer's Kite
Artifact
{3}, {T}: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
{1}{R}
Lightning Strike
Instant
Lightning Strike deals 3 damage to any target.
{1}{R}
Lightning Strike
Instant
Lightning Strike deals 3 damage to any target.
{1}{R}
Lightning Strike
Instant
Lightning Strike deals 3 damage to any target.
{2}{R}
Lightning Talons
Enchantment - Aura
Enchant creature
Enchanted creature gets +3/+0 and has first strike. (It deals combat damage before creatures without first strike.)
{3}{R}{R}
Lithophage
Creature - Insect
At the beginning of your upkeep, sacrifice Lithophage unless you sacrifice a Mountain.
7 /
7
{R}
Messenger's Speed
Enchantment - Aura
Enchant creature
Enchanted creature has trample and haste.
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
--
Mountain
Basic Land - Mountain
({T}: Add {R}.)
{1}{R}
Plated Geopede
Creature - Insect
First strike
Landfall -- Whenever a land enters the battlefield under your control, Plated Geopede gets +2/+2 until end of turn.
1 /
1
{1}{R}
Plated Geopede
Creature - Insect
First strike
Landfall -- Whenever a land enters the battlefield under your control, Plated Geopede gets +2/+2 until end of turn.
1 /
1
{1}{R}{R}
Prophetic Flamespeaker
Creature - Human Shaman
Double strike, trample
Whenever Prophetic Flamespeaker deals combat damage to a player, exile the top card of your library. You may play it this turn.
1 /
3
{3}{R}
Purphoros's Emissary
Enchantment Creature - Ox
Bestow {6}{R} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Menace (This creature can't be blocked except by two or more creatures.)
Enchanted creature gets +3/+3 and has menace.
3 /
3
{R}{R}
Searing Blaze
Instant
Searing Blaze deals 1 damage to target player or planeswalker and 1 damage to target creature that player or that planeswalker's controller controls.
Landfall -- If you had a land enter the battlefield under your control this turn, Searing Blaze deals 3 damage to that player or planeswalker and 3 damage to that creature instead.
{2}{R}
Seismic Strike
Instant
Seismic Strike deals damage to target creature equal to the number of Mountains you control.
{2}{R}
Seismic Strike
Instant
Seismic Strike deals damage to target creature equal to the number of Mountains you control.
{2}{R}{R}
Shiv's Embrace
Enchantment - Aura
Enchant creature
Enchanted creature gets +2/+2 and has flying.
{R}: Enchanted creature gets +1/+0 until end of turn.
{R}
Shock
Instant
Shock deals 2 damage to any target.
{R}
Shock
Instant
Shock deals 2 damage to any target.
{R}
Shock
Instant
Shock deals 2 damage to any target.
{4}{R}
Spire Barrage
Sorcery
Spire Barrage deals damage to any target equal to the number of Mountains you control.
{R}
Spite of Mogis
Sorcery
Spite of Mogis deals damage to target creature equal to the number of instant and sorcery cards in your graveyard. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
{3}{R}{R}
Torchling
Creature - Shapeshifter
{R}: Untap Torchling.
{R}: Target creature blocks Torchling this turn if able.
{R}: Change the target of target spell that targets only Torchling.
{1}: Torchling gets +1/-1 until end of turn.
{1}: Torchling gets -1/+1 until end of turn.
3 /
3
{8}{R}
Volley of Boulders
Sorcery
Volley of Boulders deals 6 damage divided as you choose among any number of targets.
Flashback {R}{R}{R}{R}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{3}
Vulshok Battlegear
Artifact - Equipment
Equipped creature gets +3/+3.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)