The Holy Trinity War

Detchis Morhn, God of Knowledge. Skeltor, God of War. The Brethren who served.

The Brethren grew to hate & scheme against each other, Skeleter & Detchis. One struck the other down, but the struck-down survived & sought out Detchis, who corrupted him. He sought revenge. The last fight between them combined the two Brethren into the Fallen Brother.

The Fallen Brother enslaved heathens who survived the crusade of Skeltor & his possessed warlord. Then he enslaved members of their sects. Detchis used visions to turn his prophets against the Fallen, Skeltor personally led his army against the Sect of Fire.

Detchis tried to gain all the Reich's power, followers, & magic to himself. The Fallen Brother ripped his limbs off, weakening his power. Skeltor's warlord was destroyed in battle, weakening him. He developed a hatred of slavery and saw his followers flee, nearly annihilated by the serpentine folk.

The Cause
The four gods of the Holy Reich had begrudgingly respected each other and built great things together. They needed one another. It was Yarlathontep, an Outer Being, who sowed & triggered the conflict. It was he, foreign and extra-dimensional, who drove them towards an insanity that made then unwise and brought out the worst in them.

The conflict between the Holy Trinity was one of several that resulted in the God-Limiting. Perhaps that was Yarlathontep's plan all along.