A thousand years ago during the time of the Heigar War, there was a great Wind Magic Tutor named Einstein. After a long period of research, he put forth a shocking theory - he believed that when speed surpasses the speed of light, it could reverse time.
Among all magic series, Wind Magic has the fastest speed. What could be faster than wind? But even wind cannot outspeed light.
This master Einstein suggested that by using his highest Magic Power to execute the simplest Wind Magic "Finger Wind" at full throttle, if he could make the launch speed of this spell surpass the speed of light's propagation, then he could cause time to reverse and return to the past.
At that time, no one accepted his creation in magic. Even the most imaginative mages couldn't. It was universally acknowledged that reversing time was a task even the gods absolutely could not accomplish.
