"Besides the water-element crystals, the secret method inside it is Thousands of Beads Mental Sutra; this secret method has myriad functions. If you master it, you could promote to a shadow knight at least two times faster!"
"Thank you so much, lord. Thank you so much, lord..." Zhang Gui replied. Now, the most precious things for Zhang Gui were such a kind of secret method and element crystals which could promote his cultivation. Therefore, after being rewarded, Zhang Gu became more loyal to Zhang Tie besides being extremely thrilled.
However, Zhang Gui had not imagined that there was something more precious inside for him.
