Reasonin?
Even if he was not able to see clearly, his crimson eyes made everyone presume that Nial gained sight for a short moment.
It was only then that everyone truly grasped that Nial was able to fight them head-on without actually being able to see.
This meant that the blind man was forced to focus on sounds, vibrations, energy fluctuations, and smells to make sense of his surroundings.
He had to focus on everything, absorb the information provided by his senses and digest it at the same time in order to know what was going on in his surroundings.
If he were to miss just one person in his perception, something bad might happen.
And this was certainly something Nial wanted to avoid.
His mission to protect the Priyard was the most important, even more so than his very own life.
But this was certainly not because of the Priyard's importance as the host of the Universe's core.
There were far more important things about the Priyard.