Every 20 mobs you kill your strength increases by one level. I didn't want to make it each mob, because that would be way too op. To install, just type /reload, it will go automatically. Made entirely by myself. If there are any problems please let me know in the comments below, I'll get back to it when I see it.
Please leave a diamond and a like, alot of hard work was put into this and it means alot to me.
10 diamonds for the release of Ringing A Bell Is OP.
Enjoy!