Acacia Sect: Is This Really a Proper Cultivation System?

Multiple Female Leads + System + No Excessive Mercy + Decisive and Ruthless

"Junior Sister, have you made up your mind? Want your senior brother to check your constitution?"

"Martial Uncle, you know what I'm good at..."

"This disciple would never dare disobey the Sect Master. I swear a Dao oath: I absolutely won't do more than enjoy a little reflected fame..."

He gets chosen as a furnace cauldron from the start, but why does this System seem a little shady?

Since I've joined the demonic sect, I may as well become the great Demon King and wreak havoc across the cultivation world.