About 77 years before the decline of the empire, the Mira tribe hesitantly welcomed an unexpected visitor who brought a prophecy: Valleda, a former servant of the OG High Representative, who silently observed and listened to the sensitive conversations of the OG throughout her life, ultimately foreseeing the inevitable power struggle among members of the OG Council. Out of concern for her future safety, she escaped at night and spent several weeks trekking from one Mira settlement to another by exchanging a few stolen trinkets, in exchange for food, shelter, and transportation.

After arriving in the largest Mira city at the time - Spees, Valeda requested asylum from the Mira aristocratic council and was willing to exchange all the information she knew. Initially, her secrets were kept as top secret by the parliament. However, a few months later, with the arrival of nine elders who had withdrawn from the OG High Council, Valeda's prophecy was confirmed.

Given that all of this seemed to be arranged by fate, the aristocratic parliament negotiated with Valeda and reached an agreement. Subsequently, the nine elders began actively promoting the comprehensive progress and development of the Mira tribe. At the same time, the turmoil caused by this divergence led to a massive wave of exile among the lower and middle class citizens of OG, known as "fugitives". Many people who feel oppressed in the Stargate factory either try to rebel or seek refuge in remote areas outside the OG's sphere of influence, which has triggered a supply chain crisis for OG. Feeling betrayed, OG mobilized all available resources to massacre countless towns near the border, mercilessly striking both the Mira people and fugitives. Before OG considered resource conservation more important than revenge and stopped attacking, tens of thousands of people had already lost their lives.

As the attacks ceased, the population of fugitives in Mira city significantly increased in the following years, especially due to a decrease in fear when fleeing OG territory. Out of resonance, the nine elders helped these fugitives integrate into the culture and belief system of the Mira tribe, and utilized this additional labor to fulfill their commitments to the aristocratic parliament. There are many talented and well-educated individuals among the fugitives who have been responsible for operating the Stargate factory, designing and manufacturing processes, and building weaponized equipment or OG Mech. The combination of the professional knowledge of fugitives and the abundant natural resources within Mira's territory greatly propelled Mira's modernization and catalyzed technological development at a hundredfold pace.

Due to the fact that most of the valuable resources of the Mira tribe are hidden underground and difficult for OG to access, the Mira tribe and fugitives have decided to collaborate to build an underground metropolis called Mirus, which is designed as a safe haven for technological research. Although Milus eventually became such a safe research site, a few months after construction began, nine elders evaluated their treatment and decided to terminate the partnership, taking away many loyal fugitives. However, key engineering and technical knowledge has been imparted to the Mira people, and there has been no shortage of labor supply. Most fugitives choose to stay and continue building Milus because they believe it will become their new home, and they hope this is their last nominal escape.

As time goes by, the city of Milus is about to be completed, and the builders have gathered into an unbreakable community. Cultural differences have faded to almost imperceptible levels, and marriages between Mira people and former fugitives have become common. The fusion of traditions has given birth to a generation of people with similar appearances, all of whom have proud ancestors as builders. In the end, all citizens united around a unified vision, even though their history and lineage became blurred. In commemoration of this unique development, the aristocratic council announced the Day of Liberation at the inauguration ceremony of the city of Milus, releasing the citizens from the last traces of history with a solemn ceremony, marking the birth of a new unified nation - the Phantom Clan.