The protectress deity confer great protection. One such example befitting to this context is described in the first chapter of the Pancaraksha sutra (detailing on Pancharaksha Devtas). It is said that one who holds the dharani of Mahapratisara will be protected from all forms of illness, eliminate the past non-virtuous karma, protect from all sorts of dangers. Their body becomes a vajra body not affected by fire, weapons and others.
Ref:Aakash Deb, Shri Vidya Upasak