Apothesis Theory

The 7 daemon were born from torn shreds of the Dream God. Each born of a concept, each Sacred. In time they grew more powerful and become divine.
Sunless has obtained 6 of 7 pieces of Weaver's lineage. Each slowly changing him to be more daemon-like, less human. The fusion of all 7, the completion of the lineage should be some similar to an apothesis. Alone each piece is a tremendous boon, combined they transform him. He becomes a daemon and is forcefully pushed to apothesis. The fuel or catalyst is the evolution of "Flame of Divinity" into something greater.
Much like Mordret, the bond drags Nephis into the process. As her shadow their connection pulls her towards Sacred Rank, while her Supreme nature pulls him back. Finally pulling her into a joint Ascension.