Reckless Impulse

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Giantbaiting

Create a 4/4 red and green Giant Warrior creature token with haste. Exile it at the beginning of the next end step.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it.)

Mountain

Shield Sphere

Defender
Whenever Shield Sphere blocks, put a -0/-1 counter on it.

Infernal Plunge

As an additional cost to cast this spell, sacrifice a creature.
Add {R}{R}{R}.

Great Furnace

Crimson Kobolds

Crookshank Kobolds

Burn Trail

Burn Trail deals 3 damage to any target.
Conspire (As you cast this spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose a new target for the copy.)

Kobolds of Kher Keep

Wrenn's Resolve

Kuldotha Rebirth

As an additional cost to cast this spell, sacrifice an artifact.
Create three 1/1 red Goblin creature tokens.