Activating the Full 13th Form

Fatima spent the entire night explaining the gun's 13th function. After that, she started explaining the theories and the process of activating it in the proper way. However, after I listened to all of it, I quickly realized why Fatima flatly replied "No" when I asked for a clue.

"... The methods are completely different..."

To activate the 13th Form in the normal way, you would need to first insert a sliver of your soul into the gun's core. Then, after that, you would need to mold that into a semi-conscious will. That "will" would then become the gun's "soul" and earn the right to become a Mechanical Lifeform.

"It's like creating a Nascent Soul in the cultivation stories I've read..."

I felt tired just imagining the process for that. After all, I'm no cultivator and had absolutely no idea how to split off a small part of my soul to use in the said process. Much less how to nurture it into becoming a conscious entity.