The dragon slayer finally became a dragon

【dark! crazy! Kill! destroy! Invincible! 】
I, Gu Qisha, have penetrated the foreign battlefield and am invincible in heaven and earth.
However, after the foreign battlefield was penetrated and humans were no longer a threat, they regarded me as a threat, set a trap to disable my powers, took away my armor, and killed my whole family.
Fortunately, I left behind the heart of the Black Dragon Demon God, the strongest boss in the foreign battlefield. I swallowed it when I was crippled, and from then on I turned into an emotionless killing machine...
Human beings should pay a devastating price for their actions.
Destroy, destroy, kill! Will stay with me for the rest of my life.