The Cerulean Wars

The Cerulean Wars was a series of conflicts that spread across the multiverse, first starting in the Astral Plane.

The Beginning
The buildup to the war began when those that are only remembered as the Cerulean Masters decided for themselves that the multiverse was too chaotic and wild and must be brought to order. However, they did not trust the mortals across the multiverse, believing them to be too chaotic. To that end, they created a new race of biological warriors known as the Ceruleans. These warriors were given the memories and experiences of great warriors and tacticians of the past, but without the emotion, which to their masters made them the perfect army for their conquest of all of creation.

The War
The war began on the Astral Plane, attacking first the Plane of Law, seeing it easily fallen to the army's advance. From this point, the Masters began to attack many of the planes at once, fighting a war on several fronts. The Ceruleans proved to be worth the investment, as they crushed all that dared to oppose the Masters' will.

The Tide Turns
Eventually, the war came to the mortal realm. Here the Masters' creations encountered mortals of great cunning and power. They proved to be more of a fight than previously thought, and when the Gods allied themselves with the mortals, the Ceruleans were driven back. This lasted many years until the mortals finally faced the masters themselves, and defeated them.

Aftermath
In the days following the end of the war, the Cerulean Masters were chained to the space between the realms, never again to be seen. The Ceruleans were likewise sealed away, their location lost to time, hoped to never be seen again. In addition to this, the massive amount of death that occurred across the realms caused a change in the outlook of the God of Death, Mortis. Because of the war, he decided that all life needed to end, and sought to become the ultimate one god.