Chapter 1737: Being a Heavenly Knight

Heller's smile was as familiar and warm as before. Whenever Zhang Tie promoted to a higher level in Castle of Black Iron and opened his eyes, he would be able to see Heller's brilliant smile and listen to the familiar and genial greeting. 

Perhaps it was the sweetest gift that Zhang Tie could receive after promoting to a higher level.

Feeling the perfect and powerful wind chakra, Zhang Tie slowly stood up from a boulder on the top of the mountain. Watching the snowy peaks of the verdant Immortal Mountain and the heavy mist around him, Zhang Tie felt complex.

'I'm already a heavenly knight. It's really difficult for me to reach this level.'