Universal Solvent

Viscous, lurid lime green liquid washes over one creature you can see within range. The target must make a Constitution saving throw. It takes 12d4 Acid damage on a failed save, or half as much damage on a successful one. The target begins to dissolve, and at the end of each of its turns, the target repeats the saving throw: it takes 6d4 Acid damage on a failed save, and the spell ends on a successful one. 

If damage from this spell kills a target, the target is liquefied and its space becomes difficult terrain for 1 minute.