Overlord, Vol. 7 (manga)

"The dust has settled after the final battle with the Elder Lich, but it's only the calm before the storm. When the overlord returns bearing the full weight of his army, the Lizardmen know this is truly the end. For the denizens of Nazarick, though, the outcome is more uncertain. Cocytus has grown to respect the brave tribal warriors--it would be such a shame to kill them all"--Back cover.