Mountain

Goblin Roughrider

Galvanoth

At the beginning of your upkeep, you may look at the top card of your library. You may cast it without paying its mana cost if it's an instant or sorcery spell.

Doublecast

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

Unstable Footing

Kicker {3}{R} (You may pay an additional {3}{R} as you cast this spell.)
Damage can't be prevented this turn. If this spell was kicked, it deals 5 damage to target player or planeswalker.

Deathforge Shaman

Multikicker {R} (You may pay an additional {R} any number of times as you cast this spell.)
When Deathforge Shaman enters, it deals damage to target player or planeswalker equal to twice the number of times it was kicked.

Ogre Sentry

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Lava Axe

Lava Axe deals 5 damage to target player or planeswalker.

Raging Goblin

Haste (This creature can attack and {T} as soon as it comes under your control.)

Fire Servant

If a red instant or sorcery spell you control would deal damage, it deals double that damage instead.