Previously ...
The ability of [Omni Art], Arthur can release clouds from his hands that can turn anything or anyone into something with what Arthur considers to have artistic value but cannot provide life to inanimate objects.
The ability of [Infinite Art] allows Arthur to create anything that has artistic value, yes, anything that Arthur considers to have artistic value but requires a lot of energy.
The ability of [Liberty Art] to make all of Arthur's artwork back to its original form.
This ability of [Doom's Art] will transform victims into artwork that absorb their lives slowly, Arthur requires direct body contact with his victims.
Arthur also experimented to see how long the objects he had changed and the things he brought up could last. Arthur's devil fruit ability can last as long as he wants, even though Arthur is asleep and touches the sea stone. But when Arthur sparred with Sebas and pass out, everything that Arthur had previously changed returned to its original form.
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By eating the devil's fruit and Arthur's bodily abilities are sufficient for basic techniques, Arthur's training menu changes and become heavier. The intake of Sea King meat eaten by Arthur is now almost 100 kg at every meal because of Arthur's metabolic rate increases with his body strength. Arthur always wears a sea stone bracelet now, he wants to reduce the effect of energy lost when touches sea stone.
Every morning, after waking up, Arthur always practiced 5 times the 'secret' training of Saitama 500 push-ups, 500 sit-ups, 500 squats and 50 km running plus 5 km swimming to increase stamina and to produce balanced muscles, Arthur does yoga after his morning training. After finishing his morning routine, Arthur cleaned up and breakfasted with his family. Maria also never forget to spend her time together with Arthur, after finishing with all the manners of a nobleman, this time Maria was more focused on training Arthur to use musical instruments.
This time it's a little different from the previous training because Arthur has already eaten the fruit of the evil arts. When Arthur forgot his sea stone bracelet and plays the piano in front of him, appearing notation that floated and danced around Arthur. People who listened to Arthur playing the piano immediately carried away the atmosphere of the melody, which this time had a sad tone so that many unconsciously cried. Maria was the most affected by Arthur's performance because she heard and saw the dancing notation before her, as did Sebas who watched from the corner of the room. Maria and Sebas could not hold back their tears. Arthur, who concentrated on playing the piano with his eyes closed, after completing the entire song, opened his eyes and saw Maria and Sebas prostrating tears.
Arthur: "Uh, Mother, Sebas, what's wrong with you two?"
Sebas: "It seems that unconsciously young master Arthur has used the ability of the art-art devil fruit so that it affects people who hear you play the piano." Sebas who quickly regained consciousness explained to Arthur.
Maria: "I will erase all the sad music from your practice schedule, Arthur. It's a relief that the music wasn't heard outside the house."
Maria ended Arthur's musical training, so Arthur immediately went to the library to read a book he had not yet read. Arthur wants him to be able to finish all the books in the library before sailing on the dangerous seas. After lunch, this time Arthur practiced his devil fruit abilities and the ability to use swords. He also wanted to awaken his devil fruit before sailing on the dangerous seas. From then on Arthur always wore a sea stone bracelet as long as he didn't practice his devil fruit abilities. And hopes to be able to survive more against sea stone or seawater so that it does not immediately lose energy.
At night, after dinner, Arthur practiced Haki according to his grandfather's training manual. Because Arthur has mastered Kami-e and Tekkai, making Haki's training easier.
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This time, just the day before Arthur's seventh birthday, as usual, Arthur and his family had breakfast together. At that time, Saint Adam had received a report from Sebas about the results of Arthur's devil fruit training and abilities.
Saint Adam: "Arthur, I heard the results of your training from Sebas. It seems like you train your body well and can master the ability of the devil fruit that you just ate."
Arthur: "This is all thanks to grandpa, I got the devil fruit that I wanted on my fourth birthday. On my fifth birthday, Grandpa gave me medicine to improve my recovery ability so that I could practice to the full of my potential. And on my sixth birthday, grandpa gave me lots of training manuals, Rokushiki, Haki, Fishman karate and even I was surprised to see the Dracule family's sword training manual."
Saint Adam: "Hahaha, actually grandfather was just lucky to get what you want a week before your birthday. Are you perhaps the lucky one because that's something you want?" Arthur asked his grandfather who was laughing.
Arthur: "Eh?"
Saint Adam: "A week before your third birthday, I went to the auction house. There they sell the art-art devil fruit that loses to their product rivals with the mystical zoan that is auctioned together, so that grandfather easily gets it. The remedy for recovery that grandfather got from DR. Vegapunk because grandfather heard the talk of two elders from gorosei. As for the training manual, I got it from the Donquixote family library and when I asked for it they didn't bother too much. Hahaha"
Maria: "Then, for this birthday what did Arthur ask, Father?"
Arthur: "I didn't ask for anything this time, because I didn't feel I needed anything important. And don't know what I want." Arthur's answer to his mother's question while eating his breakfast.
Saint Adam: "Therefore I am confused what should I give him? Maria do you have an idea?" Saint Adam turned to ask Maria.
Arthur: "I don't need anything this time, Grandpa?"
Saint Adam: "How could I not give a present on my grandchild's birthday." Saint Adam's answer was firm.
Maria: "If Arthur doesn't know what he wants, you should give 'that' compass."
Arthur: "Compass?"
Saint Adam: "Ah, 'that' compass. Okay. Sebas, take the 'that' compass that I hang next to my desk."
Sebas: "Yes, Saint Adam."
Sebas immediately left the dining room to go to Saint Adam's office to retrieve the 'that' compass. Shortly thereafter, Sebas returned with a small black wooden box with an octagonal shape, with a long string necklace strap tied to one side of the box.
Sebas: "Saint Adam." Sebas gave the compass Maria was referring to.
Saint Adam: "Grandfather got this broken compass when grandfather sailed in the open sea. They say that this compass shows the direction to the most valuable treasure in the world. There is also a saying that this compass shows the direction to the soul mate of the owner. But more say that the compass was broken because they didn't get anything. But after your grandmother died, and grandfather began to often forget to put something, it turns out grandfather can use this compass to find the missing object."
Maria: "I only know that the compass is strange, when I was holding it, the compass never stopped showing a different direction every minute. But maybe you can use it like your grandfather's story."
Arthur: "Don't tell me this compass..."
Arthur trembled when he saw the compass in his grasp. Arthur was very surprised because seeing a compass he had seen in the film during Arthur's previous life and the same explanation of how to use the compass that made Arthur very surprised. Because if the compass is like what Arthur thought then he knows that there is nothing more valuable than this compass.