Chu Nan went to the waterfall with empty stomach. In his mind, he always recalled the amazing sword of the black heart Yan Wang!

when he dived into the waterfall and was under the great pressure, Chu Nan still thought about where to start with the knife and how to cut the skin and split the flesh. In the space of consciousness, Chu Nan imitated the action of the black heart Yan again and again

Chu Nan thought too seriously. Unconsciously, he persisted under the waterfall for 15 minutes before reaching the limit of the sharp pain. After a while, Chu Nan entered the waterfall again. Under the pressure of...