Arcane Fission

A small arcane sphere flies from your palm to a point you choose within range and then flashes into an explosion of arcane energy. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 3d6 force damage on a failed save, or half as much damage on a successful one. Each creature in that same radius must also make a Constitution saving throw. On a failed save, a target takes 3d6 necrotic damage and gains one level of exhaustion. On a successful save, the target takes no damage and doesn't gain a level of exhaustion.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.