Boiling Oil 2014

You conjure a shallow, 15-foot-radius pool of boiling oil centered on a point within range. The pool is difficult terrain, and any creature that enters the pool or starts its turn there must make a Dexterity saving throw. On a failed save, the creature takes 3d8 fire damage and falls prone. On a successful save, a creature takes half as much damage and doesn’t fall prone.

When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.