Assault Strobe

Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)

Guttersnipe

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

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

As an additional cost to cast this spell, sacrifice a creature.
Collateral Damage deals 3 damage to any target.

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

When Goblin Arsonist dies, you may have it deal 1 damage to any target.

Flame Slash deals 4 damage to target creature.

Target creature gets +2/+1 and gains trample until end of turn.

Gain control of target creature until end of turn. Untap it. It gains trample and haste until end of turn.

Lightning Bolt deals 3 damage to any target.

Flying, haste
Impetuous Sunchaser attacks each combat if able.