After you reach Lvl. 30 the Academy will be unlocked. Heroes can learn Leader skills at the academy or replace an existing Leader skill to something else. The Academy will have one random skill available at a time, you can reset the available skill to something new twice a day for free without the use of Runes. After the 2 free uses, the refresh of a Leader skill will cost 20 runes. Each Hero will have 2 available Leader skill slots to use alternately when selected.

When selecting a hero to add a Leader Skill to, your available generated skill will not diminish and you are able to choose the hero you would like to add that skill to.

Within the Skills option, you are able to access other features - Evoution, Fusion, Create
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