The Pill Formula for the Heavenly Repairing Pill was also obtained by Jing Yan from the second part of the Qiankun Pill Path legacy that he acquired from the Death Temple.
The first part of the legacy contained formulas for First to Ninth-level Elixirs. The second part of the Alchemy Dao legacy concerned the true Divine Pills. The Heavenly Repairing Pill that Jing Yan planned to refine was one of those.
Divine Pills fundamentally surpassed Ninth-level Elixirs in essence. There was no comparison between the two.
Even Jing Yan himself was not confident in refining the Heavenly Repairing Pill, although he could reach or even exceed a fifty percent chance of achieving Perfect Quality when refining Ninth-level Elixirs. But refining Divine Pills, he had no confidence whatsoever.
However, one would never know if it was possible to succeed without trying.