Comprehensive Comic: the Dragon Slayer in the Great Voyage

Qi Heng traveled across the isolated island for ten years, was equipped with the Dragon King System, and developed the four dragon-killing magics of thunder, fire, iron and sky. I thought this was the Tenrou Island in "Fairy Tail" until the Yonkou Kaido came out of the air. The dragon's breath clashed, the thunder collided, and the army of beasts pressed forward - only then did he realize that he was in the world of One Piece. The dragon lurks in the abyss and flies into the sky. Now that the strongest creature has arrived, let's use his head to kick off the era of great pirates.