Lords are the avatars of players and rulers of their Castles.
Lords can obtain XP in various ways to level up. Constructing buildings, completing Challenge Quests, and doing research provide Lord XP. You can also quickly level your Lord up by using Lord XP items. You can obtain Lord Skill Points by leveling up your Lord.
Hunting monsters or attacking Chaotic Strongholds consumes your Lord's AP.
If you don't have enough AP, you won't be able to hunt monsters or attack Chaotic Strongholds. The Lord's AP will automatically replenish over time. The Lord's AP can be replenished immediately by using Lord AP Recovery items.