The discovery of Fourth Dimensional Energy immediately startled Vaan.
Such energy should only be found in the fourth-dimensional world. Of course, fourth-dimensional beings could have also left it behind, which seemed more likely to be the case.
In that case, it further proved that fourth-dimensional beings had visited this space region before. The Earth Spirit Worm alone was already sufficient proof.
Nevertheless, Vaan couldn't help but recall Varuna's memories.
He remembered that the Outer Beings were constantly drawn to Chaos despite the vast sea of nothingness between them. Furthermore, they couldn't break the barrier protecting Chaos from it.
If the Lord of Chaos hadn't wiped out the subsequent waves of Outer Beings, they would have likely found their way to the vulnerable, youngest chaosverse – his universe.