What's the name of the book? It tells the story of a protagonist who has an Earth Dragon Pearl in his body and can make wishes at any time, but in the end, the protagonist seems to have become an evil dragon?

The main book that tells the story of House of the Dragon is 'Fire & Blood'. It offers rich details and background about the events and characters in the series. However, there might also be related companion books or supplementary materials that expand on certain aspects.

One possible theme could be cooperation. Since the dragon and the phoenix are both in the story, they might have to work together, especially when it comes to protecting the pearl.

😋I recommend I'm Really a Dragon to you. This was a novel about the city's supernatural powers. It told the story of Sullo obtaining the Ancestral Dragon bloodline and devouring it all the way to evolve into an Ancestral Dragon. From the venomous snake, flood dragon, horned dragon, true dragon, and ancestral dragon, he observed the process of the protagonist's evolution. This novel meets your requirements. I hope you like it. Muah ~

I think 'The Dragon Riders of Pern' does. It has intense battles and powerful dragon encounters.

Based on the information you provided, I recommend the book, Fantasy: I Summon the Dragon God to Support the Sect. Although I'm not sure about the main character's name and title, you mentioned that the main character's sect is called the Heavenly Mystic Sect, and there's a branch on Earth called the Dragon Sect. The main character of this book was a weak sect in the Mysterious Sky World. Through the Divine Dragon Summoning System, he developed and strengthened the sect, becoming a powerful sect. I hope you like this fairy's recommendation. Muah ~😗

I recommend the novel " Slime and Dungeon " to you! The protagonist, Lu Qi, survived the dragon's magical breath and became a slime, starting a magical path of mutation and evolution. I hope you like this novel.

"War Concubine World: Your Highness, please go!" In this novel, the female protagonist, Empress Daqi, was reborn. After being thrown into the bottom of the lake, she transmigrated into the body of a weak princess. Because of her physical condition, she became useless, but she attracted the pursuit of many princes. One of the princes was the high priest, Zhu Yuan, the high priest of the Southern Night Kingdom. I recommend it to you. I hope you will like it. Muah ~

The main character of "The Peerless Ghost Cultivator" wanted to become a powerful existence after becoming a ghost cultivator, so he began his journey of cultivation in the underworld. I hope you like this fairy's recommendation. Muah ~😗

"Calling Gods in Other Worlds" was written by the author, Meat Bun. It was about a young man from Earth who was randomly picked by the so-called "God" during a fight and sent to a space parallel to Earth, the Heavenly Dragon Continent. Along with him, his opponent was sent to a different continent. I recommend this book because the story fits the requirements of the question. I hope you like this fairy's recommendation. Muah ~😗

The recommended novel was called "Earth's Time Traversal". It was about a pig's trotter named Du You who transmigrated to another world. I hope you like this fairy's recommendation. Muah ~😗