According to Old Li, there were three challenges in the Condensing Fire Technique:
The first was how to completely and purely imprint oneself into the pure Identity.
The second was how to ensure that the Identity, marked with one's imprint, did not get confused with the other Identities within the body once they entered it.
The third was how to compress these Identities so they could be ignited.
The most troublesome part for Feng Xue, while cultivating the Martial Arts True Form, was precisely how to scatter and then reorganize his will; otherwise, he couldn't penetrate the crystal shell of the die.
This led to the unexpectedly smooth completion of the second step, which Feng Xue had initially thought would require considerable effort and might even waste several dice.