Sky Control gave Shen Fei a Tower Master skill.
Shen Fei was familiar with this Skill Book. Previously, to farm Gemstones, he had taken Sky Control to mindlessly grind the Heaven-Reaching Tower and run Secret Realms. Aside from obtaining a large quantity of Gemstones and synthesizing them all to level nine, he had also obtained something else: the special Tower Master skill, Tenfold Amplification.
According to its description, the Tenfold Amplification skill could not only boost an attribute—such as Attack Power, range, attack speed, or health—tenfold. More importantly, it could also temporarily increase the quantity of a specific Defense Tower by ten times. This was an incredibly powerful Tower Master skill.
Unfortunately, in the game, a Tower Master's skills couldn't be reset. When he finally obtained this powerful skill, his skill slots were already full, and he couldn't learn it. As a result, he had temporarily stored the Skill Book with Sky Control.
