MTL - Begin Immortality By Slaying Demons - Chapter 351 where is that gun

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.

I opened my eyes to find myself in another world. For some odd reason, I ended up as a sword. Before my eyes laid a plain full of magic beasts, and so, I launched my body and flew in search of a partner, a wielder (females only).

“Ding! Moon-breaking Wolf. Holy evolution. 6-winged Star Beast!”

In the mortal world, the grass and trees are in autumn, she thought she could live her own life happily, but she did not expect to shoulder the heavy responsibility of revitalizing the family.

She has a very high spiritual root value, and it is reasonable to say that she is a rare genius. However, Lei Shuimu is such a fucking spiritual root that she can electrocute herself. How should she shoulder the responsibility that the Dao has entrusted to herself?

- Description from novelbuddy