In order to respec your skill points or change your class in Cube World, you must be standing next to a class trainer, as well as pay a small fee. Class trainers are found the Adventure Districts of cities. To easily find your class trainer, look for the weapons on their backs.
The Warrior Class Trainer has a large mace on their back:
The Rogue Class Trainer has a large two handed sword their back:
The Mage Class Trainer has a staff on their back.
The Ranger class trainer has a bow on their back.
Here's a helpful video on how to change your class:
Back to the Cube World section