With the development of natural sciences, people created notions of what was ordinary and what was freakish, odd, or mutant. The unusual, malfunctioning, and nonviable, especially where it related to living beings, were sometimes referred to as 'monsters', and became in some instances sideshow oddities driving sufficient attention to command a fee for their observation.
Some of the monsters or extraordinary animals reported were plainly fictional, and so the diversity with respect to them through time in imagination and legend has expanded and been used to inflame fears and justify extraordinary measure of response (something relating to moral panics and subversion ideologies.
Within fairy tales as collected by Grimm, the witch is a malevolent, child-eating monster in the guise of an old woman. The conventional characteristics of this monster also include many things associated with the intentional application of what is called 'the Evil Eye.