Fake Server Plugin?

Is there any sort of fake server plugin that would allow me to op myself and take over the server? I'm buddy buddy with some idiot who lets me manage his huge ass server and he won't op me but he'll let me send him plugins to install.

Find a plugin and just edit some things in the plugin by adding op code in there some how

Agree , find a plugin that has a source code available and modify it and include a OP command by (available to all players) and opp ursrelf Search MPGH I did stumble upon one here too, cant seem to find it anymore tho