Roy felt like he was using taiji, but the actual effect was not the same because he was not using his hands.
Strictly speaking, this distortion force field effect was similar to when he used Psychokinesis, and they were both remote. But the difference was that he could at least control the direction of Psychokinesis, while the distortion force field effect was totally chaotic and uncontrollable. Even he could not count how many force field points in his protective shield had the distortion effect at the same time.
Without a doubt, the protective shield formed by Glimmering Dawn was a very effective defensive method. With this protective shield, he would obtain an unparalleled advantage in close combat.
Isabel's sword brushed by almost half a meter in front of Roy. The error was outrageous, but he did not take the opportunity to attack Isabel with Frostmourne because he was well aware that ordinary attacks were of little use against seraph-level angels.