No more than once every 1d4 ronuds, a nuckelavee's breath weapon is a cone of withering foulness that causes painful welts, cramps, and bleeding, and only harms living creatures- this damage bypasses all energy resistance and damage reduction. Non-creature plants in the area are affected as if by a blight spell. Any creature that fails its Breath save against the breath weapon must make a Death save or contract mortasheen (see below).