A hero will learn 8 Secondary Skills out of the 28 available
A hero starts with 2 skills, so he'll have to choose 6 new skills each times he reaches a new level.
Thanks to his secondary skills, a hero can improve his skills in several domains : the way he moves, the way he fights, the way he casts spells etc ...
A hero can receive experience points by winning a combat or taking treasure chests on the adventure map. When he gains more experience, he can reach new level. Each times he reaches a new level, he'll have to choose between improving 2 Secondary Skills.
Each hero has a paper-doll equipment screen, where you can see his artifacts and secondary skills.
There are 3 levels for each Secondary Skill : basic, advanced and expert
You'll choose different secondary skills fonction of the type of your hero, his town, and his "job" (an exploring hero'll need different skills than a warrior)
Heroes will learn easily some secondary skills but will learn others with difficulties (depending on the hero type)
Some hero types cannot learn some secondary skills.
To view all the Secondary Skills, clic here
Heroes of might and magic 3, 4, 5