Shock

Rings of Brighthearth

Whenever you activate an ability, if it isn't a mana ability, you may pay {2}. If you do, copy that ability. You may choose new targets for the copy.

Tarfire

Goblin Fireslinger

{T}: This creature deals 1 damage to target player or planeswalker.

Red Sun's Zenith

Red Sun's Zenith deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle Red Sun's Zenith into its owner's library.

Raging Goblin

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

Mogg Mob

Sacrifice this creature: It deals 3 damage divided as you choose among one, two, or three targets.

Mountain

Lava Axe

Lava Axe deals 5 damage to target player or planeswalker.

Reckless Pyrosurfer

Haste
Landfall — Whenever a land you control enters, this creature gains battle cry until end of turn. (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn. Each instance of battle cry triggers separately.)

Flameblast Dragon

Flying
Whenever this creature attacks, you may pay {X}{R}. If you do, it deals X damage to any target.

Heat Shimmer

Create a token that's a copy of target creature, except it has haste and "At the beginning of the end step, exile this token."

Incinerate

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Chandra Nalaar

+1: Chandra Nalaar deals 1 damage to target player or planeswalker.
−X: Chandra Nalaar deals X damage to target creature.
−8: Chandra Nalaar deals 10 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Goblin Chieftain

Haste (This creature can attack and {T} as soon as it comes under your control.)
Other Goblin creatures you control get +1/+1 and have haste.

Prodigal Pyromancer

{T}: This creature deals 1 damage to any target.

Flamekin Brawler

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

Goblin Sky Raider

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

Firebreathing

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

Slagstorm

Choose one —
• Slagstorm deals 3 damage to each creature.
• Slagstorm deals 3 damage to each player.

Smelted Chargebug

Menace
When this creature enters, you get {E}{E} (two energy counters).
Whenever this creature attacks, you may pay {E}. If you do, another target attacking creature gets +1/+0 and gains menace until end of turn.

Curse of the Pierced Heart

Enchant player
At the beginning of enchanted player's upkeep, this Aura deals 1 damage to that player or a planeswalker that player controls.