Aurora's Shocking Cloud

You create an electric cloud that covers the ground in a 15-foot square centered on a point within range. After 2 rounds it disappears at the start of the 3rd round.

When the cloud appears, any enemy creature that moves into the cloud for the first time on a turn or starts its turn there takes 2d4 lightning damage. You and any friendly creature that moves into the cloud for the first time on a turn or starts its turn there are healed for 1d4 hit points. The cloud can’t heal undead.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage and healing increases by 1d4 for each slot level above 2nd.