The flying vessel was three thousand meters long, completely black, and was shaped like a weaver's shuttle. It continuously advanced through the dark void of space towards the vast sea before them.
If Ji Ning wished to reach Vastheaven Palace, he absolutely had to pass through the Sea of Darkness! If he went around it, it would result in an incredibly long detour. What's more, the map which Daolord Solesky had given Ning didn't even specify the details to any such detour, instead simply telling him to go straight through the sea. This was because this was actually the safest option; the other options were even more dangerous!
Although this was safer by comparison, it was still a rather dangerous trip for World-level cultivators. If they weren't careful, they would easily die in this place.