Coiled Tinviper

Mountain

Furnace of Rath

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

Firefly

Flying
{R}: Firefly gets +1/+0 until end of turn.

Rolling Thunder

Rolling Thunder deals X damage divided as you choose among any number of targets.

Blood Frenzy

Cast this spell only before the combat damage step.
Target attacking or blocking creature gets +4/+0 until end of turn. Destroy that creature at the beginning of the next end step.

Flowstone Giant

{R}: Flowstone Giant gets +2/-2 until end of turn.

Fireslinger

{T}: Fireslinger deals 1 damage to any target and 1 damage to you.

Magmasaur

Magmasaur enters with five +1/+1 counters on it.
At the beginning of your upkeep, you may remove a +1/+1 counter from Magmasaur. If you don't, sacrifice Magmasaur and it deals damage equal to the number of +1/+1 counters on it to each creature without flying and each player.

Lightning Elemental

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

Flowstone Salamander

{R}: Flowstone Salamander deals 1 damage to target creature blocking it.

Searing Touch

Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Searing Touch deals 1 damage to any target.

Plains

Squee's Toy

{T}: Prevent the next 1 damage that would be dealt to target creature this turn.

Wild Wurm

When Wild Wurm enters, flip a coin. If you lose the flip, return Wild Wurm to its owner's hand.

Kindle

Kindle deals X damage to any target, where X is 2 plus the number of cards named Kindle in all graveyards.

Goblin Bombardment

Sacrifice a creature: Goblin Bombardment deals 1 damage to any target.

Tahngarth's Rage

Enchant creature
Enchanted creature gets +3/+0 as long as it's attacking. Otherwise, it gets -2/-1.

Lightning Blast

Lightning Blast deals 4 damage to any target.

Disenchant

Maze of Shadows

{T}: Add {C}.
{T}: Untap target attacking creature with shadow. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

Soltari Guerrillas

Shadow (This creature can block or be blocked by only creatures with shadow.)
{0}: The next time Soltari Guerrillas would deal combat damage to an opponent this turn, it deals that damage to target creature instead.

Mogg Fanatic

Sacrifice Mogg Fanatic: It deals 1 damage to any target.

Sandstone Warrior

First strike (This creature deals combat damage before creatures without first strike.)
{R}: Sandstone Warrior gets +1/+0 until end of turn.