Overlord (2015)

S2E4 Army of Death

The Lizard men's alliance triumphs in battle, overcoming the undead forces. After their victory, they manage to defeat Guardian Cocytus, showcasing the guardians' newfound ability to learn from their experiences and adapt to changing circumstances. In response, Ainz Ooal Gown adjusts his strategy, commanding Cocytus to subdue the Lizard men and bring them under the dominion of the Great Tomb of Nazarick.