For Master Sky Claw and many others, this would be their last chance at greatness. Master Sky Claw has managed to reach the eighth transformation. So it is clear that the best he can manage is getting a force diagram.
Arthur shook his head and said, "Actually, it is not even certain that he will be able to get the force diagram. But he has a high chance of doing so."
The seventh transformation is the minimum level of cultivation that anyone who wants to get the force diagram as their reward for participating in the regional sect examination must have.
So Skylar, or Master Sky Claw, as he would like to be called, has a high chance of succeeding in his endeavor. If he were at the ninth transformation of the first mortal coil, it would be nearly certain that he would succeed in earning the force diagram.