Bloom, Aisha and others in “Unfinished Business”

It sounds like Selina was learning to be a good fairy.

Aisha

So why the change?

I was the keeper of the Alexandria library. I brought Selina there and showed her the Legendarium. Though I only heard rumors of its powers, but never had I tried to use it until that very day. Discovering how dangerous the Legendarium really was, I traveled all over the world...

Looking for a way to lock it.

Yes. But once I returned from my search things took a turn for the worse.