Reading guide: In "Perfect World", it is said that the small tower has been protected by the willow god for the longest time, mainly for the following reasons:
Although the small tower has a mysterious origin and is powerful when it is complete, it is an immortal king weapon, but it once participated in the terrifying battle at the end of the boundary sea in the era of the emperor's fall, and was beaten to pieces by the three quasi-immortal emperors, and the tower collapsed into several sections, scattered all over the nine heavens and ten realms. Later, when he met Shi Hao, he only recovered the four-story tower body, although he was still a top-level existence, his strength was far from returning to the peak. Even if he later fought against the Upper Realm Giants with Liu Shen, killed the Yin Yang Dao people to recapture the two-story tower body, and restored it to the sixth layer after fusion, its strength would only reach the Void Dao Realm or the Slash Me Realm at most. The Primordial Gate leads to the Boundary Sea is full of dangers, and most of the characters that appear in it are true immortals or immortal king-level powerhouses, the strength of these strong people is far beyond the small tower, they can crush the small tower with just one finger, and the small tower cannot survive alone in such an environment.
Liu Shen entered the Primordial Gate, not only to find the secret of breaking the king and becoming the emperor, but also to find the source of darkness and clear the darkness from the root, so that the Great Dark Reckoning could not descend on the heavens. In order to regain his two-story tower, the small tower begged Yanagi to help, and after the matter was completed, he entered the primordial gate with Yanagigami. Perhaps out of a sense of responsibility to the small tower and the need to face the challenges of the boundary sea together, Liu Shen led the small tower forward. In order to protect it, in the two million years of exploring the boundary sea, Yanagi gave up exploring the secret realms and treasures that may be dangerous, in order to preserve his strength and ensure that the small tower can survive safely under his own protection. Because although the opportunity in the boundary sea is good, it is more dangerous for the small tower, and the small tower may die here if it is not careful. Therefore, Liu Shen chose to take the small tower step by step through the primordial gate to the end of the boundary sea, and has consistently protected the small tower for these two million years.
Shi Hao is a disciple of Liu Shen, and Liu Shen also has deep feelings and protection for Shi Hao. However, in the process of growing up, Shi Hao continued to experience various battles and grinds, gradually improving his strength and realm, and he was able to face many challenges and dangers independently after a certain stage. And the environment in which Shi Hao is located and the enemies he faces are different from the situation in Jiehai. Although Shi Hao will also encounter strong opponents, he relies on his hard work, talent, and opportunity to constantly break through himself and grow in battle. In the two million years since entering the Primordial Gate, the small tower has been relying on the protection of the Willow God, and it is difficult for its own strength to be substantially improved in such a dangerous environment, if it does not have the protection of the Willow God, it may have been destroyed by the powerhouses in the Boundary Sea long ago. Therefore, judging from the length of time and the degree of dependence on being protected in a specific environment, the small tower is the one that has been protected by the willow god the longest.
To sum up, the small tower is extremely weak in the boundary sea environment of the primordial gate due to its own strength, and the willow god took it into the boundary sea out of responsibility and common goals, and in the long period of two million years, for the safety of the small tower, he gave up many opportunities for the safety of the small tower, and always tried his best to protect it from the threat of the realm sea powerhouse, so it can be said that the small tower was protected by the willow god for the longest time.