The Hero Class Icon and the ability to specialise your Hero becomes available once your Hero is fully ascended and fully levelled.

Please be aware that the Special Skill must also be 8/8 to unlock Hero Classes. If your Special Skill is not 8/8 when you have fully Ascended and fully levelled your Hero, the chances of receiving the Special Ability Level Up will be quintupled.

Hero Classes are available for all Heroes, no matter how many stars they have. The Hero Class for each Hero can be viewed by clicking on the Hero Class icon on the top left-hand corner of the Hero.