Acid Globe

You hurl a globe of magical acid that explodes at a point you can see within 120 feet of it. Each creature in a 20-foot radius centered at a point must make a Dexterity saving throw or take 6d6 Acid damage.

On contact, the globe explodes, covering the terrain with caustic acid for 3 turns. When a creature enters the spell's area for the first time on a turn or starts its turn there, it must make a Dexterity saving throw. On a failed save, they take 1d6 Acid damage and a receive temporary −1 penalty to AC for 3 turns. For each turn that the acid persists, the damage and AC penalty increases by 1d6, and an additional -1.

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