Another suggestion! This one is thanks to @Carned Right now there is no way to tell if you have killed a player before unless someone witnesses it while you are online. It would be cool to have player heads drop if you are in the survival world so you could have a bounty on someone and have proof of the kill. (There's also plugins for that but having it be between players is more fun). Or just collect all the heads of staff (@Opalium ).