Flying

Landfall -- Whenever a land enters the battlefield under your control, Akoum Hellkite deals 1 damage to any target. If that land is a Mountain, Akoum Hellkite deals 2 damage instead.

This spell can't be countered.

Flying, trample, protection from white and from blue

{R}: Akroma, Angel of Fury gets +1/+0 until end of turn.

Morph {3}{R}{R}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

{T}: Ben-Ben, Akki Hermit deals damage to target attacking creature equal to the number of untapped Mountains you control.

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

Blasphemous Act deals 13 damage to each creature.

{T}: Add {C}.

{3}, {T}: Draw a card. Activate only if you control a creature with power 4 or greater.

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.)

Indestructible

Whenever Brash Taunter is dealt damage, it deals that much damage to target opponent.

{2}{R}, {T}: Brash Taunter fights another target creature.

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

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.

Whenever you activate a loyalty ability of a Chandra planeswalker, you may pay {1}. If you do, copy that ability. You may choose new targets for the copy.

{1}, {T}, Discard a Mountain card or a red card: Draw a card.

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.

Enchant creature

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

Coldsteel Heart enters the battlefield tapped.

As Coldsteel Heart enters the battlefield, choose a color.

{T}: Add one mana of the chosen color.

Flying

{X}, {T}: Crimson Hellkite deals X damage to target creature. Spend only red mana on X.

At the beginning of your upkeep, if you control six or more lands, create a 5/5 red Dragon creature token with flying.

Earth Servant gets +0/+1 for each Mountain you control.

{2}, {T}: Draw a card. Activate only if you control three or more lands with the same name.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Whenever equipped creature attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped.

Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Fire Diamond enters the battlefield tapped.

{T}: Add {R}.

Flying

When Fire Dragon enters the battlefield, it deals damage to target creature equal to the number of Mountains you control.

You can cast spells only during your turn and you can cast no more than two spells each turn.

You may cast spells with mana value less than or equal to the number of lands you control without paying their mana costs.

Flying

Whenever Flameblast Dragon attacks, you may pay {X}{R}. If you do, Flameblast Dragon deals X damage to any target.

Forgotten Cave enters the battlefield tapped.

{T}: Add {R}.

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

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.

Enchant creature

Enchanted creature gets +1/+0 for each Mountain you control.

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

Flying

{3}{R}: Destroy target artifact. Hoard-Smelter Dragon gets +X/+0 until end of turn, where X is that artifact's mana value.

{R}: Inferno Titan gets +1/+0 until end of turn.

Whenever Inferno Titan enters the battlefield or attacks, it deals 3 damage divided as you choose among one, two, or three targets.

This spell can't be countered.

Flying, haste

{R}: Inferno of the Star Mounts gets +1/+0 until end of turn. When its power becomes 20 this way, it deals 20 damage to any target.

{T}: Add {R}.

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.

+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."

Flying

You don't lose unspent red mana as steps and phases end.

When Leyline Tyrant dies, you may pay any amount of {R}. When you do, it deals that much damage to any target.

{3}, {T}: Draw three cards. This ability costs {1} more to activate for each card in your hand.

Magmaquake deals X damage to each creature without flying and each planeswalker.

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

Whenever equipped creature deals combat damage to a player, you may draw two cards. If you do, discard a card.

Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

({T}: Add {R}.)

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Myriad Landscape enters the battlefield tapped.

{T}: Add {C}.

{2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

Nyx Lotus enters the battlefield tapped.

{T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

Whenever equipped creature deals combat damage to a player, you may draw a card.

Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Alliance -- Whenever another creature enters the battlefield under your control, create a Treasure token if this is the first or second time this ability has resolved this turn. Otherwise, you may pay {X}. When you do, Rose Room Treasurer deals X damage to any target.

Menace

When Ruin Grinder dies, each player may discard their hand and draw seven cards.

Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

As long as it's your turn and you control four or more Mountains, Sardian Cliffstomper gets +X/+0, where X is the number of Mountains you control.

Landfall -- Whenever a land enters the battlefield under your control, you may pay {2}. If you do, draw a card.

Seismic Strike deals damage to target creature equal to the number of Mountains you control.

Flying (This creature can't be blocked except by creatures with flying or reach.)

{1}{R}: Shivan Hellkite deals 1 damage to any target.

Smoldering Crater enters the battlefield tapped.

{T}: Add {R}.

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

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

When Solemn Simulacrum enters the battlefield, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

When Solemn Simulacrum dies, you may draw a card.

Flying

When Spawn of Thraxes enters the battlefield, it deals damage to any target equal to the number of Mountains you control.

Spire Barrage deals damage to any target equal to the number of Mountains you control.

Landfall -- Whenever a land enters the battlefield under your control, Spitfire Lagac deals 1 damage to each opponent.

Spitting Earth deals damage to target creature equal to the number of Mountains you control.

Starstorm deals X damage to each creature.

Cycling {3} ({3}, Discard this card: Draw a card.)

Stonefury deals damage to target creature equal to the number of lands you control.

Imprint -- When Strata Scythe enters the battlefield, search your library for a land card, exile it, then shuffle.

Equipped creature gets +1/+1 for each land on the battlefield with the same name as the exiled card.

Equip {3}

Indestructible

As Stuffy Doll enters the battlefield, choose a player.

Whenever Stuffy Doll is dealt damage, it deals that much damage to the chosen player.

{T}: Stuffy Doll deals 1 damage to itself.

Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order.

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

Equip {1}

Equipped creature gets +1/+1.

Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Equip {2}

{T}: Add {C}.

{2}, {T}, Sacrifice Terminal Moraine: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Trample

When Themberchaud enters the battlefield, he deals X damage to each other creature without flying and each player, where X is the number of Mountains you control.

You may exert Themberchaud as he attacks. When you do, he gains flying until end of turn. (An exerted creature won't untap during your next untap step.)

Landfall -- Whenever a land enters the battlefield under your control, Tunneling Geopede deals 1 damage to each opponent.

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.

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}.

{2}, {T}, Sacrifice Wayfarer's Bauble: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Worn Powerstone enters the battlefield tapped.

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