tap tap
Ryuk moved inside the hallway leading to Main Palace, his Amber eyes seemingly hazy in the middle, proving the existence of the Restriction he placed on his eyesight.
The reason for just blinding himself instead of adding illusions was due to the presence of another restriction which was taking a chunk of his focus.
Using previous world knowledge and understanding of the methods he can apply to enhance his Energy utilization, he nullified the surrounding atmospheric pressure to 5 Cm of his body.
In normal conditions, Such a thing will cause bodily fluid to vaporize due to lack of external pressure resulting in tissue and organ failures, but he needed to increase his control over energy by using his mana to keep his body under a pressure equal to Atmospheric pressure.
A very complicated yet profitable method since, he needed to keep focused 24 hours, indirectly doing training even while walking.