"Mu Ning, thanks for earlier." Feng Yun gently said. Although her action was unnecessary, her effort still matters.
"It's my responsibility to protect Young Master!" Mu Ning politely said.
"Mu Ning, I am sure, you already understood that it should remain secret."
Mu Ning didn't hesitate and heaven's oath to protect his secret forever. Feng Yun nodded in satisfaction with he didn't need to worry about his secret leak. At least Mu Ning won't reveal it.
Once someone took the heaven oath, they would bind the heaven, if they break the oath their soul would perish in punishment.
"Good, here take this!" Feng Yun ponders for a moment before taking out a storage ring and giving it to Mu Ling.
