Overlord. Volume 4. Heroes of the Lizardmen

An merciless army of death is approaching the settlements of the lizardmen. To save their tribes, to live with their beloved females, the lizardmen take up arms… Meanwhile, Ainz directs his army into battle for an "experiment," assigning the command to the guardian of the fifth floor of Nazarick, "The Lord of the Ice River" Cocytus. Before your eyes unfolds a merciless world where the strong devour the weak.