Scorching Lava

Kicker {R} (You may pay an additional {R} as you cast this spell.)
Scorching Lava deals 2 damage to any target. If this spell was kicked, that creature can't be regenerated this turn and if it would die this turn, exile it instead.

Shock

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Lightning Strike

Lightning Strike deals 3 damage to any target.

Galvanic Blast

Galvanic Blast deals 2 damage to any target.
Metalcraft — Galvanic Blast deals 4 damage instead if you control three or more artifacts.

Thunderbolt

Choose one —
• Thunderbolt deals 3 damage to target player or planeswalker.
• Thunderbolt deals 4 damage to target creature with flying.

Rift Bolt

Rift Bolt deals 3 damage to any target.
Suspend 1—{R} (Rather than cast this card from your hand, you may pay {R} and exile it with a time counter on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Tarfire

Mountain

Incinerate

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