In the Doomed Star Sea, the boundary between the Void World and the Mortal World.

A grand ancient city made of white bones flew through the void like a land of bones.

The city of bones was called a Bone Shatter City, a great weapon of war built by the Bonedrudes.

There were a total of three Bone Shatter Cities that were named after the weapons of the Bone Emperor of the Bonedrudes in the Void World.

A Bone Shatter City could be considered to be a super warship. They ...