Overlord, Vol. 17 (manga)

Visited by emissaries from the Great Tomb of Nazarick, Emperor Jircniv of the Baharuth Empire is faced with an ultimatum from Ainz Ooal Gown. Confronted with the overwhelming might of this mysterious enemy, his country’s only chance for survival lies in Jircniv talking his way out of this predicament…but even that faint hope is dashed after Ainz plays him like a fiddle during their negotiations. His only choice is to bet everything on a single play, setting in motion a future that no one could have imagined...