Seriously though, she has a spell (possibly the other witches as well) that no kidding turns you into a "newt" (small moonwalker NPC model). It didn't last long and I didn't get a chance to check if any stats were affected before it wore off and I killed her.
Part of a Task also. Kill all 3 witches and loot 3 items. Taskgiver wanders swamp area (as a newt, haha!)
When she turns you into a newt.... She silences you. I didn't notice any stat changes other than You have been silenced when trying to heal my group members.