The biggest hurdle he had to overcome was his body, including his blindness.
However, while his physical traits could be adjusted relatively easily with arduous training and proper nutrition solutions, this was not the case for his disability.
Because of that, Nial began his research about the various kinds of abilities once he finished making notes, which was his means to clear his mind.
What he lacked in intelligence, he more than made up for in hard work and determination.
He took a bit longer to figure out specific things, however, the weird part was that he could easily decipher things once he found a great point to start at.
As such, it had always been the most important for him to organize everything and have a blueprint ready that allowed him to follow the paths the procured intel would unveil to him.
Thus, his mind was clear, and he made a few adjustments about the criteria the ability he was looking for required.