Inferno Titan

{R}: Inferno Titan gets +1/+0 until end of turn.
Whenever Inferno Titan enters or attacks, it deals 3 damage divided as you choose among one, two, or three targets.

Leyline of Punishment

If Leyline of Punishment is in your opening hand, you may begin the game with it on the battlefield.
Players can't gain life.
Damage can't be prevented.

Combust

This spell can't be countered.
Combust deals 5 damage to target white or blue creature. The damage can't be prevented.

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Ember Hauler

{1}, Sacrifice Ember Hauler: It deals 2 damage to any target.

Mountain

Lava Axe

Lava Axe deals 5 damage to target player or planeswalker.

Goblin Balloon Brigade

{R}: Goblin Balloon Brigade gains flying until end of turn.

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Dragon's Claw

Whenever a player casts a red spell, you may gain 1 life.

Chandra's Spitfire

Flying
Whenever an opponent is dealt noncombat damage, Chandra's Spitfire gets +3/+0 until end of turn.

Chandra's Outrage

Chandra's Outrage deals 4 damage to target creature and 2 damage to that creature's controller.

Cyclops Gladiator

Whenever Cyclops Gladiator attacks, you may have it deal damage equal to its power to target creature defending player controls. If you do, that creature deals damage equal to its power to Cyclops Gladiator.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.