Thousands of years ago, the Phantom Soul World was invaded by "Circulation". This non-human creature was extremely aggressive and murderous, destroying lives wherever it went. The "Changeers" and "Soul Patterns" living in the Phantom Soul Realm temporarily blocked the invasion at the cost of hundreds of years of fighting, the loss of half of their territory, and the death of hundreds of millions of warriors. Since then, the Phantom Soul Realm has been divided into two parts, the Purity Realm on the left and the Phantom Soul Realm on the right.
Hundreds of years later...
