The fusion wasn't entirely smooth. It was brutal and forced, without any prior acknowledgment or permission obtained. The process was far from effortless. However, based on Wang Baole's understanding of Dharmic Armaments, he knew how difficult it was to acquire a Dharmic Armament's acknowledgment of one's ownership. The broken arm would be equally challenging.
It was likely that no one except its original master could have gotten it to submit readily. Wang Baole wasn't looking for a willing submission though. He only needed to be able to wield it.
What he had found problematic was the potential expenditure in energy as well as the backlash from wielding the arm. That was why he had decided to fuse it with his Flame Snatch Thearch Armor, so using the arm would expend the armor's power instead. Similarly, the backlash would fall on the armor as well.
