>The Vorlons were among the first races in the galaxy to attain sentience and become space-faring creatures. In the distant past, the Vorlons attempted a grand experiment into reaching a higher plane of existence where the souls existed and all life was founded. To accomplish this, they poured all their knowledge into creating a gateway to this dimension. After activating the gate, the vortex into Thirdspace was formed and the aliens within that realm came pouring out, intent on destroying all other forms of life. After much hardship, the Vorlons finally managed to push the enemy back, but one of the gateways was lost in Hyperspace where it was hidden from the Vorlons. They would encode some of their servants with an automated message to warn the younger races of the threat from the inhabitants of Thirdspace.
https://babylon5.fandom.com/wiki/Vorlon
>Distant Past
>The Vorlons were among the first races in the galaxy to attain sentience and become space-faring creatures. In the distant past, the Vorlons attempted a grand experiment into reaching a higher plane of existence where the souls existed and all life was founded. To accomplish this, they poured all their knowledge into creating a gateway to this dimension. After activating the gate, the vortex into Thirdspace was formed and the aliens within that realm came pouring out, intent on destroying all other forms of life. After much hardship, the Vorlons finally managed to push the enemy back, but one of the gateways was lost in Hyperspace where it was hidden from the Vorlons. They would encode some of their servants with an automated message to warn the younger races of the threat from the inhabitants of Thirdspace.