The complete manufacturing technology for the Floating City
This is the knowledge that his foster mother Selena dreams of acquiring; even before his foster father was corrupted by the will of Hell, this foster mother was already collecting it.
After Noah took control of the Mage City, he gained full access to the database, where he found incomplete manufacturing technology, but it was not enough to make a city soar into the sky.
This level of knowledge is elusive to a Legendary Mage, but to Divine beings, it is not.
However, when Noah made his request, the Divine being decisively refused him.
Because the existence of the Floating City poses a threat to Divine beings, and in history, a crazed Legendary Mage once piloted a Floating City to attack the Divine Realm, causing significant damage.
