Witches

A witch is a person, man or woman, who has the power to effect change by magical means, which is called witchcraft.

Witches get their power from demons, they sign their soul off in exchange for the power of spellcasting. A witch can use her power to kill and injure, for example Elizabeth used her power on the demon who gave her, her powers and made her spit needles out of her mouth, in the episode Malleus Maleficarum. A witch can also use her power to get a promotion or to win a contest.

Shtriga
A Shtriga is a witch who disguises itself as a human and sneaks into children bedroom at night to suck out Spiritus Vitae, to feed on. After this process, the child will become ill and will eventually die. A Shtriga was the first creature classified as a witch who confronted the brothers in Something Wicked. Contrary to the Albanian belief, it did not suck blood but instead Spiritus Vitae.