I found a wiki called warriors of myth wiki, but I do not want to adopt a wiki that I don’t know anything about, so do it just leave it to rot?
If you have no interest in a wiki, you don't have to do anything with it. If someone is interested, they should take over maintaining the wiki. If not, then yeah, it will just "rot".
Not sure why you are asking us what you should do. It sounds like you weren't planning to do anything anyway.
What do you think?