apparently zon sheyln happened due to the birth of acturn. Sheyln came to help the new born diety to fend off being preyed on by one of the dark tapestry deities. She was losing the fight and zon kuthon appeared and assisted her and at some point basically both where near death and at the same time chose to sacrifice themselves to empower the other and in that moment they went captain planet became zon sheyln threw the eldritch horror back beyond the material plane and the cosmic birthday happens.
apparently zon sheyln happened due to the birth of acturn. Sheyln came to help the new born diety to fend off being preyed on by one of the dark tapestry deities. She was losing the fight and zon kuthon appeared and assisted her and at some point basically both where near death and at the same time chose to sacrifice themselves to empower the other and in that moment they went captain planet became zon sheyln threw the eldritch horror back beyond the material plane and the cosmic birthday happens.