Chronicle of the dragon slayer [revamped version]

"AHHHHHHHHHHHHH""WHYYYYYYYY""NOOOOOOOO""IT HUUUUUURT AHHHH"I could hear the screams of the people inside the castle, each screaming as they were burned alive, I heard the voices of friends, daily, loved ones, and everyone else that I held dear. But I still had to run, to stop would mean to lose any hope of revenge."Huhuhuhhuhuh" I woke up as the nightmare ended, and clenched my chest to calm my breath."This nightmare again." that's right this wasn't the first time I had seen this nightmare, it had come to me every night since I had run away from the hell that the dragons bought about on the capital.It had been 40 years since that day and each of the 14610 days I had spent in the mountains I had spent training. Training so that I would be able to get my revenge, training so that I won't have to experience that hell again, and training so that I could lop off the heads of those damned monsters.I had no meaning left in life,becoming strong enough to get my own revenge against those abhorrent creatures, became my sole purpose in life, and one day my wishes came true.