In boi, skills are what make every class unique and learning new skills will place new and powerful methods of mayhem and destruction at your fingertips. Every character will automatically learn new skills as they gain levels. Skills can be learned at level 10, 25, 40, 55, 20, and 85. All classes learn new skills at these same levels. In addition, there are other class specific skills that characters can learn once obtaining a special item in-game. You can check what skills are available at which levels at any time by clicking boi money the Skills button on the bottom of your screen. You can see all the relevant information about your skills on this screen, including mana cost, cooldown, range and a skill description.
Upon reaching the required level for a skill, a small window will pop up at the bottom of your screen. This window will contain all new skills available to you at your level(boi gold).
Types of Skills
 

There are two main types of skills for Battle of the Immortals characters; active and passive skills.
Active skills must be placed on an action bar to be used and have a direct effect like dealing damage, healing a player, or placing a harmful effect on an enemy.
Passive skills increase some facet of your character and are always active after reaching their required level. Passive skills will also appear in the New Skills Learned window when your character reaches the appropriate level, but you won't be able to drag a passive skill onto any of boi gold your action bars.