Spellmistress

Kill an Aravu spellmistress.

Source: wiktionary

A dryad could carry only one spell and it was entirely at the whim of the spellmistress as to which of the ten or so spells at her command she used.

Source: wiktionary

‘[…] I tell you, we were about to be cursed as dark-arts-men when we went abroad this morning, and people saw what happened to us. The God-man were bent on it. It were only Filip’s quick tongue that saved us. We were the victims of someone, he says, not practitioners ourselves. We are just helpless innocents, like someone slipped a potion to or something.’ I stopped trying to peel off the skins; it was making me ill again. ‘But who, though? Who would want to?’ ‘No one can guess. Some spellmistress as wants babbies of a Bear, is the conjecture. Others tried saying we had brought it on ourselves, wearing the skins past midnight.[…]’

Source: wiktionary

“Your spells aren’t as smooth or regular as the factory tablets,” the spellmistress continued.

Source: wiktionary