The Witches of Morva (Orddu, Orwen, and Orgoch) are three anti-heroes from Disney's 1985 feature film The Black Cauldron. Infamous for making bargains, they sold the Black Cauldron for Taran's Magic Sword.
In the film, as Taran, Eilonwy, and Fflewddur go looking for the Black Cauldron, they eventually find it in the three witches' possession. The witches are quite unwilling to give the Cauldron up, however, even though Orwen develops a soft spot for Fflewddur. Once Taran reveals he intends to destroy the Cauldron, they laughingly trade the Cauldron for his magical sword, but it is only after the trade that they cackingly reveal the Cauldron cannot be destroyed; the only way to break it's power is for a living being to willingly jump into it. As it turns out, obtaining the Cauldron was not a smart move on Taran's part at all; with the Witches, it would've been secure forever, though now that it is his possession, the guards of the Horned King immediately come and take it.
After the Horned King is defeated and Gurgi has broken the Cauldron's power by jumping into it, Taran's sword is returned. Taran strikes a final bargain with the witches; he'll give them the sword and the cauldron in return for them restoring the life of Gurgi. They are reluctant, but once Fflewddur teases them on their magical incompetence, the witches prove themselves by taking the magical items and indeed, resurrecting Gurgi back from the deceased.
Their role can be viewed as stricly neutral, rather than protagonistic, antagonistic or even anti-heroic; they never pick a side between the mortals and the Horned King.