Ainz Ooul Gown is known as a powerful God, he rules over nazerik. While being undead he is originally from earth, he was trapped inside of the a video game, he keeps this a secret from most people.
Ainz has a large group of powerful monsters known as the floor guardians, all of them are deeply loyal to him. Albedo a succubus is the leader of the floor guardians.
Ainz heard a small village is near nazerik, he decided that he needed to see if they are a threat to him and his ruling