After refining Venerable Sword Saint's Origin Bloodline Power, Chi Xue and Po Tian's strength had advanced by leaps and bounds. This was especially true after they mastered Venerable Sword Saint's various secret arts; in techniques like Phantom Combo, they even showed signs of surpassing their teacher. If things continued this way, then after they fully refined Venerable Sword Saint's Origin Bloodline Power, their strength might not be much lower than his had been, even if they failed to break through to the Near-Saint Seventeenth Heaven.
It made sense. Cultivation realm alone could not represent one's full strength, and Ling Tian was a prime example. After Chi Xue and Po Tian refined Venerable Sword Saint's Origin Bloodline Power, the same might be true for them. At the very least, once they had fully refined it, their strength would not be much lower than Venerable Sword Saint's had been at the Near-Saint Seventeenth Heaven.
This was not to say that Chi Xue and the others had more astonishing talent. It only meant that they were "standing on Venerable Sword Saint's shoulders." After all, if they could not refine his Origin Bloodline Power and master his various secret arts—or if Venerable Sword Saint had not told them the secret art for refining powerful Origin Bloodline Power—they could never have improved so much. At the very least, they would have remained weaker than him for a long time.
But Venerable Sword Saint had "passed on" all of this to Chi Xue and the others, giving them the chance to reach, or even surpass, his level of strength. This gave the Po Family Brothers hope that they could kill or capture Ling Tian. Once Chi Xue and Po Tian reached Venerable Sword Saint's level, the two of them working together to execute Phantom Combo would