As long as there are two or more instant and/or sorcery cards in your graveyard, Ghitu Lavarunner gets +1/+0 and has haste.

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

You may sacrifice two Mountains rather than pay this spell's mana cost. Fireblast deals 4 damage to any target.

Lightning Bolt deals 3 damage to any target.

Needle Drop deals 1 damage to any target that was dealt damage this turn. Draw a card.

Chain Lightning deals 3 damage to any target. Then that player or that permanent's controller may pay {R}{R}. If the player does, they may copy this spell and may choose a new target for that copy.

Lava Spike deals 3 damage to target player or planeswalker.

Whenever you cast an instant or sorcery spell, Kiln Fiend gets +3/+0 until end of turn.

Choose one — • Counter target spell if it's blue. • Destroy target permanent if it's blue.

Searing Barrage deals 5 damage to target creature. Adamant — If at least three red mana was spent to cast this spell, Searing Barrage deals 3 damage to that creature's controller.

Searing Spear deals 3 damage to any target.