It's been 200 years since The humans of Earth experienced the descent of the Trinity. The Arête was the first thing to arrive, bringing with it what many believed to be superpowers for all. Then the Corporis, the ideal dream for all those who dreamed of cultivation. Lastly came the Tree of Infinite possibilities the System of Yggdrasil, and its ability to provide a path of improvement for the Arête and Corporis. At first, while the human race was still adjusting they didn't realize the arrival of the Trinity was a gift to all beings. During the next 50 years, Humans were brought to the brink of extinction by those very creature's they use to keep locked up in cages. It was only thanks to humanity's adaptive nature that after 20 more years they were finally able to rise back up, and with 100 more years take back control of about 80% of the world. (At a slow rate) Read as Jp/CN web novel.  Warning: I'm an amateur writer who simply has a large imagination and wishes to put it into words.