This campaign is set in the world of Iyvis. It is a high fantasy setting, high in magic and magic items. It also has its own pantheon of recognised Gods which are known throughout the land and often interact with the material plane, they aren't just fictional beings.
It is mostly classic medieval style swords and sorcery, especially so in the starting areas, however later on and further into the different continents, the technology level will slowly increase, becoming an almost pre-steampunk esque style game.
The world is filled with custom lore and characters, so if building a warlock/paladin/cleric etc. then let me know and we'll work out the patron or gods or whichever power you need to follow. There are many races in this, most available in the players handbook or Volo's Guide to Monsters.