Vitriolic Pool

You conjure a pool of acid on the ground at a point you can see within range.  The pool has a radius of 10ft. and cannot effect creatures that fly or levitate above the ground.  A creature takes 2d4 acid damage immediately when it enters the spell’s area for the first time on a turn or starts its turn there, and 1d4 acid damage at the end of its next turn.

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