Herag remembered clearly that space-time currents were located in the void of the Endless Plane, and it was possible to encounter them anywhere.
The fact that this black train dares to travel in the void of the Endless Plane indicates that its body strength must be able to withstand the space-time currents.
Otherwise, if unlucky, colliding directly with the space-time currents would result in a destroyed train and a doomed fate.
It seemed as if Mr. Acorn could see what Herag was thinking, saying, "This train is called the Plane Train, built by the Boundary Land specifically for travel between various planes, used for transporting personnel and some cargo. And this is just for passenger transport, there are many starships used for plane warships. You'll likely see them if you have the chance in the future."
"Plane Train…"
Herag pondered over what Mr. Acorn had said—Plane Train, starships, what level of civilization would be needed to create such things.
