The Protean Era begins with the arrival of The Proteans to Kreigh. Why they chose Kreigh as the center point of the creation of mortality remains a mystery.
A parallel timeline to the Divine Timeline, this covers only the events that took place on Kreigh in greater granularity.
Over the course of 4 years, The Proteans created all of sentient mortal life. While The Divine Architecture already existed, as well as most basic plant life, The Proteans used this as their muse for creation.
The final act of The Protean Cradle was to create what was later referred to as The Protean Pantheon. The creation of the mantels was not intended to created gods, as The Proteans had no concept of divinity outside of The Divine Architecture. Later on into the events of the Protean Ascension, the ones who held the mantels were referred to as such by the other Highmortals, and revered as such.
After the Protean Cradle and the Protean Ascension, The Proteans gathered the Highmortals of Kreigh, as well as The Protean Pantheon. This meeting took place in a large open valley on Kreigh that later became the home of the city of Volaris, the founding city of what would ultimately become the Drassnian Empire.