Itoxbl is a advanced leveling bot for your discord server with configurable settings… PS: its free
You can add level roles, you can change xp settings, you can change the level up message, you can change the prefix you can add levels to users, you can remove levels from users, you have your own leaderboard, you can blacklist a channel/user from gaining levels!
!help - Gives you the help message
!rank - Gives you a nice looking rank embed message
!prefix (Your prefix) - like this !prefix #
!leaderboard - Display the leaderboard for your server
!add-level {@user} {level} looks like this !add-level @tajomstvo 10
!setchannel or !channel-levelup #channel looks like this !setchannel #channel
!levelmessage or !levelupmessage {Your-Text} looks like this !levelmessage Hey {member} you just got to level {level}!
(And so much more so you should add Itoxbl and start the great level system your server needs!)