Han Li took out the Time-Sky Tower, partly because with the Void Bell, the Time-Sky Tower was not of much use to him anymore, and on the other hand, he wanted to quickly develop the Han Mansion, allowing his beloved wife and concubines, as well as his descendants, to make rapid progress in their cultivation. The Li Manor would soon be merged into the Han Mansion.
With the supreme grade Divine Weapon, the Time-Sky Tower, the development speed of Han Mansion would surge by many folds.
However, the Time-Sky Tower, as good as it was, also had other restrictions. The level permissions were set by Han Li, and the Time-Sky Tower itself came with limitations.
Time spent inside the Time-Sky Tower was time consumed from one's lifespan; those with a lack of longevity entering the Time-Sky Tower were courting death.