Resurrection of Spiritual Energy: I Opened a Trumpet Millions of Years Ago

[Reminder before reading: This book is tagged with transformation, gender change, pseudo-quick travel, and pseudo-invincibility. The main character is male, which will satisfy readers' various criticisms. As an ordinary man in the village, he hunted the evil dragon that brought harm to his hometown alone. After the evil dragon died, it left a vicious curse: In the future, you will live alone, and everyone close to you will grow old. In order to give his impoverished family a chance to make a comeback, he volunteered to become a slave. However, when he found out that his younger brothers and sisters had been sold as slaves by their father, he suffered a mental breakdown and was bought as a private chat in the Colosseum. The old gladiator's encouragement made him Reinvigorate yourself, and the flesh and blood and blessings of the trapped beast bring him back to life: The descendants of the dragon will never be timid, break free from the shackles of restraint, I will use my flesh and blood to cast a golden body for your glory, so that all things in the world will fear you.