You inhale a large breath, then pull fiendish acids into your lungs, then exhale a brown acidic cloud in a 15’ cone. Creatures in this cone make a Constitution save or take 2d8 acid damage and acid begins to corrode their weapons and armor. A nonmagical weapon or armor has a -1 penalty to attack and damage rolls or armor bonus permanently. Once a weapon or armor reaches a negative value exceeding it's natural bonus it is destroyed (this affect does not apply to magical items). A magical weapon or armor has a -1 penalty to attack and damage rolls or armor bonus for the duration, or until a creature uses their action to clean the acid off the weapon or armor.

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