Leaders can level up within the duration of a game by gaining experience points. To do so, the player needs to complete quests or use its leader ability. When leveling up, the leader will have his look evolved and his leader power will grow stronger but keep the same cost. The leader's level is shown above him to his left.
Activated at the proper moment during a game, the leader ability can be very beneficial to the player and will evolve as a leader levels up. The upgrade in power of this special ability is shown by the visual aspect of its icon.