Cacophony of Chaos

A twist in reality spawns a portal leading to an elemental plane. On the round of casting and every round there after a Mephit driven only by a desire to destroy flies from the portal at the nearest creature it can see exploding upon contact.

Choose a damage type upon casting this spell, acid, cold, fire, lightning, poison, or thunder. Upon casting this spell, and at the beginning of the casters turn until the spell ends, A mephit will fly out of the portal with a range of 90ft and strike the closest creature to the portal exploding, dealing 1d12 + spellcasting ability modifier.

If no creatures are within range of the attack the Mephits will target random objects.

If the attack misses the Mephit explodes and dies, thus missing (None of your ohhh the mephits still there shennanigans, OH LOOK ANOTHER ONE, no.... Not okay. Stop being a rules lawyer and be nice to your DM, you gremlin)

Can be used with Careful Spell Metamagic to target specific creatures

At higher levels -  Deals an additional 1d12 of damage