Originally posted by Dalorath:

He keeps insisting it must be a glitch because he hasn't installed any mods. Is it possible that he was on a modded server at some point, and it auto downloaded some files?

No, since that's not how Valheim or mods work. It's not a glitch and they know full well what they're doing.

Originally posted by Forsaken1:

I would definitely not play with that "friend" if he cannot be honest.

I wouldn't associate with that "friend" at all. If they're pulling stuff like that on your server, then they're likely doing similar kinds of behavior to people out of game as well - not worth having in your life, period.