You create small mote of tempest and throw it at creature in range. Make a ranged spell attack against the target. On a hit, the target takes 1d6 thunder damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of it must succeed on a Dexterity saving throw or take 2d6 lightning damage and lose their reaction until the start of your next turn.

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.