While life will could heal injuries, reincarnation will could reconstruct injuries! There was no doubt that life will was the far better healing will, however, life will only allowed one's body to recover to its original state. Sometimes, even after healing, one's body would be weaker. However, reincarnation will allowed one to evolve with every injury!
When life and reincarnation wills were combined, the result was something straight from the Heavens themselves.
Accidentally ruptured a meridian while undergoing cultivation deviation? No problem, now your meridians are stronger than they've ever been. Broke a bone? No problem, here are stronger bones. Fainted due to exhaustion? Don't worry, now your stamina is even greater now.
This ability allowed Madeleine to enter the leagues of Crystal Dragons, gaining the chance to continuously increase her mental energy pool with her reincarnation will.