Qigong could enhance one's constitution, prolong life, and increase strength.
Yusuf Zuck, with a belief that having many skills was beneficial, officially began delving into the practice of qigong.
He had just entered the gateway, everything was still novel and unknown. Of course, he also knew that his real ace was the mysterious Blood Beads. As long as the Blood Beads kept activating, all that inner strength and qigong could take a back seat.
However, cultivation did have its benefits. At least in the future when he interacted with practitioners of internal martial arts, he could disguise himself as one of their kind, thereby numbing his enemies or opponents.
As for the matter of extracting energy innately contained within objects, he could only dream about it. He couldn't do it, and neither could anyone else.
Perhaps scientists could achieve that, but that was within the realm of science.