1) In battles against armies larger than his own, the hero receives a bonus to attack. The higher the level and the stronger the enemy army, the greater the effect of the specialization.
2) Before a battle, a demon hero can use his mana to summon reinforcements (they disappear after the battle).
3) When fighting armies that contain sworn enemies, the hero receives a bonus to attack. The more types of enemies in the army, the higher the bonus.
4) Increases the chance of recruiting creatures of the same faction (for a fee) and reduces the cost of adding them to the army.