XP

XP stands for Experience Points: a hero gains these when defeating opponents. When a hero gains enough xp, she/he will reach a new level, resulting in higher attributes.

During fights, a hero can gain xp during the following actions: The xp gained depends on the opponent: the higher the attributes, the more xp will be gained.
 * When striking the final blow on an opponent, the striking hero gains xp.
 * When completing a fight, xp is gained and spread among all heroes still standing.
 * When a succesful Assist is done, the assister gains xp.

Heroes level up automatically whenever enough xp is gained to reach a new level. This results in increased attributes. The way the attributes are increased is controlled by the Growth Divvying settings of a hero.