Demon Lord Rimuru could evade Light speed attacks at a certain distance and could detect or grasp the movements of it. even before becoming a True Dragon Lord It was stated in one of the new chapters that Fuse wrote.
Well, it's impossible to avoid the speed of light after seeing it, so it's necessary to immediately move to evasive action as soon as the magic is detected.
If I were to refer to my case, I would always be able to grasp the movement of magic essence within a radius of 100 meters with 『Universal Perception』. After detecting the attack by light magic on the magic essence of this peripheral part, it will be 100 meters divided by a little less than 300,000 kilometers per second, and the time required for the bullet to land will be 『0.000000333564095198152 seconds』.
A normal person wouldn't even be able to react, but in my case, with 『Thought Acceleration』, my perception speed is 100,000 times faster, so I can get a little time to take countermeasures until the bullet hits.
Even so, it goes without saying that it's the time you feel, so it's so close that you can't do anything at all.
Even so, the conditions were the same for the attacking side, so it was a very unrealistic story to see the target's movement and react.
But then...