In the territory of Huaxu Family, deep in the Thunder Lake.
Dragons and boas were hiding in the vast lake. In the boundless water, thin and purple bolts of lightning were faintly visible, dazzling across. Looking down from the sky, one would find that these thunderbolts had drawn a giant spell symbol which was miles long. A strong natural power had been venting from the spell symbols, turning this vast lake into a forbidden area for all kinds of evil.
With a good eyesight and luck, one could see the few sparsely scattered footprints under the giant and sturdy jade board, through the water. Each footprint was three-hundred-meters-long, sinking meters deep into the jade board with clear toe-print patterns, which were complicated, curved, also forming ancient spell symbols.