A Ritual

"That's why it took me so long to complete the spell. Aside from it being my first time trying to cast a spell like that, it was also difficult to find a shell," Adelwin said.

The way he said it was suspicious, and Fabian couldn't help but crease his forehead as he wondered what Adelwin was hiding. Realizing that Fabian was suspecting something off, Adelwin verified.

"Alright, please don't look at me like that. I'm telling the truth. It's just–well, I'm his brother. I can't let him inhabit just someone's body without doing a background check, can I?"

Adelwin sighed and explained that it took a long time to see the bigger picture of the shell. At the very least, Adelwin had to determine if the shell lived a comfortable enough life for Adelwin to see Niels in. 

Due to his concerns and considerations, he ended up putting Niels in the body of a noble, but he lived in another kingdom.