"Kid, now that you've fallen into my hands, do you think you can still escape? I'll give you two choices: a quick death or being tortured to death by me. You're a smart guy, so I imagine you know what choice to make!"
The Saint Heir deliberately refrained from acting to avoid damaging Jiang Xiaobai's physical body, as he hoped to obtain an undamaged physique. If he could acquire Jiang Xiaobai's undamaged body, the Saint Heir's Heavenly Returning Skill could unleash its full potential.
There was truth in what the Saint Heir said: Jiang Xiaobai was indeed smart. From the two choices given by the Saint Heir, he gleaned some information.
