|Although this article is based on canonical information, the actual name of this subject is conjectural.|
The Transformation Curse was a spell that caused the afflicted to transform into various beings.
The only known instance of this curse's usage was when the Thricewise Kenny cast it on Dawn Summers in retribution for Dawn cheating on him with his roommate. Under its influence, Dawn mutated into a giant, a centaur, and eventually a living doll, though she managed to break the spell by apologizing to Kenny. Eventually, the curse would have caused Dawn to transform into a fire slug, though Kenny assured Dawn that he would have lifted the curse before that point either way.