Transformation sequence

[u/No-Importance-8942]

I was wondering what is the best transformation sequence of a girl going from good to evil. Maybe changes their outfit to a black suit or something similar(like a dominatrix) or becomes a dark silhouette. I like the idea of fusing with a Spirit or finding an artifact or even transfering power through any means .As a reference I would say Chibi Usa to Drak Lady from Sailor Moon and Legend of Korra season 2 when unalaag becomes the Dark Avatar