Each class adds a simple flat bonus to one attribute and a new talent tree with new feats and skills as well as new actions based on which playstyle you have.
Warrior - Gives a flat bonus to Health, and more focus on health feats and actions that will help regenerate health or increase defense to lessen damage. Eventually Warrior may class change again into an advanced class.
Archer - Gives a flat bonus to attack, and more focus on attack skills, feats, and additional actions. Eventually may class change into a similar class or into an advanced class.
Rogue - Gives a flat bonus to speed and more focus on speed skills, feats, and special actions along side bonus actions. May class change into an advanced class.
Special Class changes occur when goven a mission by a mentor specifically to gain an advanced tier 1 class. These are Mage, Priest, and Druid.
Mage - Gives access and flat bonus to Magic and Mana attributes feats, and special magic actions. May change class into a Tier 3 class after mastering 1 or more elements in magic.
Elemental mastery depends on the quantity of a specific spell element type and spell rank of each one. Special actions may grant flat bonus to magic and towards one other attribute.
Priest -