Ias Sterina

Ias Sterina (イアス=ステリナ) was the original world of humans, the Ancient Gods, and the Mechanical Goddesses.

The human civilization developed to an extremely technologically advanced stage, producing towers that soared into space and the Mechanical Goddesses.

Through the events that triggered the War of the Three Gods, Ias Sterina and Nei Sterina merged to form a new world named Dir Lifyna. The Ancient Gods and the Mechanical Goddesses were defeated, and the human technological civilization was in ruins. The humans who survived into the new world retained practically no knowledge of their ancestors' legacy.

Trivia
Many of the Ancient Gods bear resemblance to actual gods in real world mythologies. A number of ancient technology reference also appear similar to real world technology.