Mortals first breached the sound barrier, mortals first maintained supersonic speeds for long flights.
Flying high in the sky, Amberser found the sensation quite exhilarating, sensing the air being torn into turbulent streams rushing past him.
Exhilarating it might be, but there were still quite a few problems.
This armor was not quite aerodynamic, and had it been streamlined like a fighter jet, he estimated the speed could have been further increased.
Moreover, the outer layer of the Hell Knight Armor was controlled by that flame specter, which seemed a bit unstable at supersonic speeds. Amberser guessed the continuous vibrations of the body were making the specter a bit "dizzy".
Then there was the issue of the Mithril Mech, which was not suited for supersonic flight either. Amberser could feel many parts of his body struggling to withstand the vibrations brought about by flying at such speeds, resulting in damage.