Kessig Flamebreather

Whenever you cast a noncreature spell, Kessig Flamebreather deals 1 damage to each opponent.

Mountain

Add {R}{R}, then add {R} for each card named Rite of Flame in each graveyard.

Defender
{T}: Thermo-Alchemist deals 1 damage to each opponent.
Whenever you cast an instant or sorcery spell, untap Thermo-Alchemist.

Whenever you cast an instant or sorcery spell, Guttersnipe deals 2 damage to each opponent.

Lava Spike deals 3 damage to target player or planeswalker.

Flame Rift deals 4 damage to each player.

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.

Whenever you cast a noncreature spell, Firebrand Archer deals 1 damage to each opponent.