The Holy Blade (Gusion)

In the Magic Academy there was a man named Gusion, he was a very talented guy and highly skilled but he never used his power, but once. Gusion was born without powers, he was abandoned and adopted by the guardians of The Magic Academy. When Gusion was eight years old they pulled out a magic blade and stabbed Gusion's finger allowing it's magic to flow into his veins. Fourteen years later at night Gusion was amazed by his power and it got out of hand. The guardians had no choice but to punish Gusion and take back his powers. They held Gusion down like triple gravity but it wasn't enough to stop him Gusion was to fast and assassinated the ones who raised him.

He regrets it and swore never to use his power again,

Could he keep this promise?

Will he break it?

Well if he does I think it would be to save The Land Of Dawn and be the greatest hero...