Acrid Maw

Your face goes gaunt and pale as you dislocate your lower jawbone from its socket and hyperextend it well past its normal limits, you then expel a large gaseous cloud of acrid necrotic fumes towards an enemy you can see within range. The target must make a Constitution saving throw or take (1d12) necrotic damage as the acrid toxic cloud surrounds them and burns away at their skin.

This spells damage increases by 1d12 when you reach higher levels, 5th level (2d12), 10th level (3d12), 15th level (4d12).