Acidic Missile

Caster creates three orbs of green acid. 

Each orb strikes a creature of your choice that you can see within range. An orb deals 1d6  acid damage to its target. The orbs all strike simultaneously, and you can direct them to hit one creature or several.

If orb misses it's target it will explode causing 1d4 damage to any creature within 5ft.

Using a Higher-Level Spell Slot. The spell creates one more orb for each spell slot level above 2.