Thunder Ball

You create a ball of thunder and fling it at one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 bludgeoning damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of the point where the thunder ball explodes must succeed on a Dexterity saving throw or take 2d6 lightning damage.

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