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.