Absolute Immunity and durability

Two days ago, In the sparring ground within Nyx's castle, Yang Chen was lying on the ground with a bruised face and panted for breath with his body covered in sweat.

"Master, drink this. You feel better" Nyx reached his side and handed a bottle while moving the strands of hair under her ear.

"No way! I am not drinking that cursed drink!"

"And why am I the only one who is covered in bruises and there's not a single scratch on your body?"

Yang Chen wiped the sweat off his forehead and grabbed the bottle from her hand. He gulped down the weird drink with a disgusted face.

Blarg!

"Nyx, Did I do something wrong? Why are you beating me up in the form of sparring?"

"And what the hell is this drink?" Yang Chen spit out what he had drunk and looked at her with a questioning expression. He had enough of getting beat up and drinking this disgusting drink.