Have

Searing Spear

Searing Spear deals 3 damage to any target.

Getting

Chain Lightning

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.

Firebrand Archer

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

Goblin Fireslinger

{T}: This creature deals 1 damage to target player or planeswalker.

Mountain

Thermo-Alchemist

Defender
{T}: This creature deals 1 damage to each opponent.
Whenever you cast an instant or sorcery spell, untap this creature.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Curse of the Pierced Heart

Enchant player
At the beginning of enchanted player's upkeep, this Aura deals 1 damage to that player or a planeswalker that player controls.

Lightning Strike

Lightning Strike deals 3 damage to any target.

Shock

Magma Spray

Magma Spray deals 2 damage to target creature. If that creature would die this turn, exile it instead.