mcMMO

"The goal of mcMMO is to take core Minecraft game mechanics and expand them to add an extensive and quality RPG experience. mcMMO adds thirteen unique skills to train and level in."

ObtaniaMC uses the Overhaul edition of mcMMO. You can get started with mcMMO using /mcmmo.

As mcMMO is rather large, it is worth checking out the official mcMMO wiki for more information if you are unfamiliar with it: https://wiki.mcmmo.org/

mcMMO Credits

You may get mcMMO Credits from Crates. These can be redeemed using /redeem and applied to a skill of choice where 1 credit = 1 level.