C245 Whale-swallowing Draconic Serpents Went Ashore

After studying carefully for the past two months, Zhang Xiaoyu discovered that Hydro-earth-thunder Array were formed from three level six defensive arrays. In other words, in order to successfully study the Hydro-earth-thunder Array, one had to first learn three of them.

Zhang Xiaoyu wasn't afraid to spend too much time on it; he was afraid that he might not have any clues