My Apprentice Is the Pirate King

My name is Deaver Kahn. I obtained the master-disciple system and traveled to the world of One Piece thousands of years ago. Because the higher the apprentice's qualifications and achievements, I can increase the lifespan and strength of the master and apprentice, and even gain the abilities of the apprentice, so I have countless disciples. In modern times, I have also accepted some good disciples, the best of whom is Gol D. Roger. He was a random kid, but he conquered the Great Channel and arrived at the final island of Ravdru. He was called the Pirate King Gol D. Roger. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.