Overlord – Kingdom Fall Arc

Season: 4

Episodes: 10–13

In the Kingdom Fall Arc, Ainz Ooal Gown declares total war on the Re-Estize Kingdom after a foolish noble attacks his trade routes. Using the incident as a pretext, Ainz sends his Floor Guardians to unleash a brutal invasion. The Kingdom scrambles to defend itself, but betrayal from within seals its fate. Prince Zanac is murdered by nobles, Brain Unglaus dies in a valiant duel with Cocytus, and Princess Renner joins Nazarick, becoming a demon.