acid evocation 

Traditions arcane, primal

Cast [>>] somatic, verbal

Range 120 feet; Area 20-foot-radius burst

Duration 1 minute

You evoke a storm of acid rain that pelts the area for the spell's duration. A creature that begins its turn in the area takes 3d8 acid damage (basic Reflex save).

Heightened (+2) The damage increases by 1d8.

LOGM, page 106.