The Second Abyssal War

Military: War

In an effort to curb the ambition of the growing human kingdoms, Aeturnum sages attempt to re-open Antecea's long dormant Nexus. Unfortunately for them, due to deliberate tampering or simply the ages of disuse wearing down the mechanisms, the attempt only succeeded in tearing open a rift to the Lower Planes.

The fiends preparedness to invade as soon as the rift was torn suggests some level of sabotage on their part. Fortunately, this war was far shorter than its predecessor, as an organization of monster slayers and planar defenders called the Nightguard were able to cut off the serpent's head, so to speak, and ended the extraplanar invasion before it could truly gain full momentum.