Su Yu has only been to the Star Picking Tower twice, and both times were brief visits, using the teleportation formation in the tower to travel between the Dàyùe Mansion and the Earth Immortal Mansion.
He did not know much about the power of the Star Picking Tower, but it was recorded in the Earth Immortal Mansion's scriptures that the Star Picking Tower had a long history and was one of the renowned formations in the Daqian cultivation world. The entirety of the Daqian cultivation world had only a handful of level-five formation masters, one of whom was Xinghai, the current ancestor of the Star Picking Tower.
To note, Taoist Tianyu was the only level-four top formation master at the Earth Immortal Mansion, which is one of the top ten immortal sects.
Thus, the scarcity and strength of level-five formation masters became obvious.
