The Witch is a minor character from Disney Villains War.
Disney Villains War
In the first round of the first war, Narissa sent two fellow seekers of darkness to attack Maleficent before she could become a threat to Chernabog's plans. One of the seekers, the Witch, was tricked by Narissa in the form of Ursula into go first, thereby leading her into conflict with Maleficent's Goons, who raided her with arrows and boulders, before Maleficent finally arrived, discovered Diablo's petrification by Lady Tremaine, and ordered the Goons to trap her in stone liquid, turning her into a stone statue.
However, Narissa was prepared for the Witch's demise and sent the Horned King to confront his rival next.