The ancient world was truly amazing, there were even underwater warships.
Then why not call it a submarine?
Because at least these underwater warships were not strictly considered submarines, because their appearance was very different from the submarines of modern earth. They were more like enclosed warships, and they were very large.
Of course, it had its own combat system, but it still couldn't get rid of the idea of the ancient giant crossbow.
However, these ancient giant arrows could be shot far in the air, and they flew very fast. However, underwater, the plasma flames shot out by the nightmare stones could still be effective, but the range and firing speed were greatly reduced.
Most importantly, these ancient underwater warships were unable to produce oxygen on a large scale, so they could not travel underwater for a long time.
