In the Academy of Heroes building located in the City, you can produce a resource for leveling up heroes — Books of experience.

📚 Depending on its level, the Academy produces a certain amount of Books of experience per hour.

📚 The Academy produces only level 1 rarity Books of experience: books of other rarities can be obtained from the Task Board and other sources.

📚 Books of experience accumulate in the Academy up to a certain limit — you can collect them at any time by clicking on the icon above the building.

📚 The productivity and capacity of the Academy increase with each new level of the building.

Please note: The Academy can be purchased in the Building Gallery after completing the task Honorable Duel.