Amralia is just like earth you can even call it parallel earth but with primal energy known as mana. This is the world of swords and magic and the system. everyone here born with system. their classes tho will unlock it self when they came of age(16) . class you'll get is based on your luck . If someone wants to be a blacksmith they will get blacksmith or Magicsmith or Weponsmith class. there are classes related to medicine or alchemy or researchers and also classes for warriors like the saint sabre, the berserker, the classes of mage like elemental, black mage, white mage.
let's talk about the world . amralia it self several century ago it wasn't like it is today. it was that when Apocalypse began and the dungeon began to appear and the mana ran rampant and gates of different races began to appear. and the brutal war began among certain races that killed milion upon milion inocent people. humanity came at stage of Extinction. when the supreme God gives humanity new hope within the system and classes. After this, humankind fought and the war ended after the negotiations. God and goddesses started take interest and even gave blessings and rewards through system . amralia had four continents before but after waking up its mana core all continents merge into a super continent with the exception of some islands.
The races that inhibits amralia are humans, Demihumans, dwarves, elves, dragons and Drgonkins Or darconics, vampire, spirits and fairies etc. etc. after several years of war when peace came some races become neutral, some just waiting for the right time.