Your class is the primary definition of what your legend can do in Battles.

A class includes:

Each Legend chooses one class. Starting on level 1, the legend gains the first skill per skill tree (that’s already three skills!) and the class passive. A new skill can be learned level gained after level one. On level 6, you can also choose the class ultimate!

The skills of a class are used by using the corresponding action cooldowns and skill cooldowns.

Take a look at a selection of classes: