Thunder Stone

You touch a small stone, imbuing it with thunderous energy, which lasts until the spell ends. The stone can be thrown or fired from a sling. A target hit by a stone takes 2d6 thunder damage and the burst of thunderous energy can be heard up to 100 feet away.

Once fired, or otherwise out of your possession, it dissipates at the end of the turn. Thereafter, while the spell persists, you can use a bonus action to cause the stone to reappear in your hand.

At Higher Levels. When you cast this spell using a 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.