"The Gate of Truth, the highest achievement constructed by the powerhouses of the Arcane Council to exhaust all truths in the world. I have heard that the gate contains all the truths of the universe, surpassing all divine artifacts as a Chaos Artifact."
"Back in those days, the Arcane Mages spread fear across the multiverse, collecting resources from countless planes and dispatching pure-blooded Beastmen to cross the world's boundaries to clear those planes of rebellious natives, relying on the Gate of Truth."
"That gate was the core object used by the Arcane Mages to dominate the multiverse."
"However, during the Twilight of the Gods, the Gate of Truth was shattered in the final battle, and the pure-blooded Beastmen acquired some of its fragments. It's estimated that after all these years, they have researched something out of it and are using it to traverse planes."
The Fairy Mother Tree is not very clear about the actual situation.
