Soverick's Invented Artifact.

The rune to create demorgorgs was not created in a day. It all started with Stelios's rune that he made on Helios's back. Helios studied it and came up with changes that the tree father applied when he finally got access to Helios within the ant queen's abode. 

It was then that Helios tried to break through and Stelios tried to take advantage of the situation only to be cornered and have half of his Celestial power ripped from him.

That was the first divine engine. It is a tool not made out of metal like most artifacts, but made out of flesh and blood given form by the presence of the fragments of order that giants possess. Its main function is to take advantage of another powerful being's existence to empower its wielder. It will siphon power and energy from its target for this purpose.