Inside the cultivation room, Zhou Xun sat cross-legged, a square Thunder Pond suspended before him, continuously refining the thunder-origin power within it.
After two months of refinement, the larger crystal of mysterious thunder had been completely absorbed, and only half of the slightly smaller one remained. At most, another half month would be enough to finish!
"By then, hopefully it will be enough to supply the Thunder Pond's advancement to Top-grade!" Zhou Xun thought to himself.
Chapter 605