There was a type of rune warship in the extreme spiritual realm that originated from ancient times.
The battleships could be big or small. The big ones could hold tens of thousands of cultivators and cross hundreds of thousands of miles.
A transportation tool like a boat could borrow the power of the river to travel all the way to the ends of the earth.
Cultivators used this characteristic to turn the energy of heaven and earth into a Great river and sea, driving the symbol warships to travel between heaven and earth.
They didn't need to worry about energy supplies. Even if they were unmanned, they could still travel on their own for 10000 years.
It wasn't as slow as a real ship, but its speed was strange, and it moved like a strong wind.
At a certain time in the past, runic warships could be seen everywhere in the sky above the extreme spiritual realm. In the decisive battles between many major forces, runic warships were often dispatched.
