Forgotten Title the mc has an exoskeleton in the shape of spider legs and no, it has nothing to do with spider man

takes place in another world, the situation is that of humanity fighting invading monsters from another world, the mc has an exoskeleton in the shape of spider legs, the exoskeleton is white, as far as I got I think he got certain spots of another color due to some evolution, the mc ventures out alone but as far as I remember he has a city or something that he's the protector, the world is basically forest outside some points where humanity gathers i guess, there's no romance i guess too and that's basically all i remember, any suggestions please ? sthe world is basically forest outside some points where humanity gathers i guess, there's no romance i guess too and that's basically all i remember, any suggestions please ? if there was any grammar error forgive my bad english

 

Douluo Dalu
Edit : Sory didn't read all of your post before i answered , it probably isn't it

 

I think you might be looking for a Doulou Dalu fanfic.

 

if you find it please let me know the name, the fanfic I mean, sounds interesting