Alchemical Geyser

With a tremendous explosion, a fountain of alchemist’s fire erupts from a chosen point within range. Every creature in a 10-foot radius centered on that point must make a Dexterity saving throw. A target takes 1d4 fire damage on a failed save and half as much on a successful one. A creature who fails its saving throw takes an additional 1d4 fire damage at the start of each of its turns. A creature can end the ongoing fire damage by using its action to make a DC 10 Dexterity check to extinguish the flames.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, you create one additional geyser for each slot level above 1st. Overlapping damage from different geysers do not stack