Nailisi was having the time of her life capturing elemental creatures. For someone at her level, if it had not been for such a special environment and possessing weird equipment like the 12 Notes of First Purgatory, it would be impossible for her to capture that many elemental creatures.
While she had initially only been capturing the creatures to feed her magic power furnace, she got increasingly excited about it.
It got to a point that whenever she found herself, there was no elemental creatures spared. Regardless of level or use, every single one of them was chucked into her purgatory of elements.
Nailisi quickly put away her equipment when she heard the loud, terrifying voice. She transformed into her skeleton king form and took a nightmare out of the spirit space.
The nightmare was level nine and it should have evolved into some other form of spirit. For some reason, however, there were no changes with it and it was stuck being a nightmare.