Create Mephits

You touch up to 2 stones and turn them into 2 different types of Mephits of your choice. The Mephits are under your control for the duration. The Mephits share initiative with you, and cannot hold actions. If the spell ends early (you lose concentration) the Mephits will flee. Casting Dispel Magic on one will cause all of them to turn back into stones. Upon death they turn back into rocks as well. You can only pick CR 1/4 Mephits.

As a Bonus Action on your later turns, you can command the Mephits.

Using a Higher-Level Spell Slot. The amount of Mephits increases by 1 for each spell slot level above 3rd (each new one requiring another stone).