Having been drained once before, Song Shuhang developed an immunity to "becoming a power source," so his recovery was much faster than last time.
—This ability was probably an upgraded version of his "pain endurance."
Senior White opened his eyes and smiled, "Ah, finally... we've reached this step. From now on, nothing can obstruct our path to enlightenment."
He spoke a cool line, but Senior White was so weak that he couldn't even move a finger and could only lie there, resting for a while.
Unlike Song Shuhang, he didn't have the "undying fat whale golden core" or a body that was fully semi-immortal, nor did he possess the bug-level innate skill of "pain endurance."
"Are you happy?" Song Shuhang asked.
He wasn't asking if Senior White was "happy about proving his Dao," but rather if he "enjoyed the process."