Before the origin beings there were the utopians,an advance civilization.

But they were not alone,there were the demons,evil,violent, and powerful monsters born from hell, literally hellbent on destroying everything. Due to the ancient utopians intelligence they were able to fend off the hordes of demons, but not all of them.The phantom beast almost brought utopia to the brink of destruction by acquiring Abbadons staff.

What was special about the phantom beast was his mother was Abbadon, the knight of Hell,and his father was an unknown Ghost, so he was part demon, part poltergeist, which was a highly powerful combination

And when Abbadon was locked up he began to search for her weapons, and he almost found all of them, except for her staff, which was located in utopia

he barged into central utopia, killing many civilians and headed straight to Abaddons staff.

But the Utopians were prepared and barely managed to capture him and hold him down long enough to perform a ritual and banish him to the twisted realm, but he was able to convert it into his own realm, The phantom Realm
and he has never escaped, yet