Most devil fruits when eaten can give some changes to the person or give them moves that are as if instincts engraved in there body. Like becoming an element body for a logia fruit user is instinct in the begining stages and they don't know how to control the process, it's more like a switch.

Now most devil fruits are at the beginner stage when eaten, meaning their abilities are hard to control or get used to, like Luffy not getting used to his rubber body. Now the Uchū Uchū No Mi, being the outrageous fruit that it is doesn't just give some information or instincts for body control, nope it came with a huge amount of information that straight up embedded to my brain.

Considering the huge info amount, let's just start with what the main fruit ability is, as long as cut of a part of my body with the intention to make an illusion world, that part will turn into a spherical white stone the size of a pebble with which anyone who has the stone can access the illusion world of that stone. Accessing it is similar to genjutsu, meaning the person whose thinking of accessing the stone will have their a piece of their soul sucked into it with which they can interact with the illusion world as if it were a real one.

I freaked out when I saw the part for sacrificing a limb or organ but the I checked the term referring to 'any' body part and so with fingers crossed and hope that I won't have to cut my fingers for my ability, I plucked a hair from my head and wished for it to turn into an world stone as I call it. The happiness that I felt when I saw the hair expand and change shape and colour to a pure white sphere was unimaginable. I can handle being Saitama (there are weirder hairstyles then bald in this world) but not Gojo Satoru, I don't want to be half the man I used to be.

Setting that aside I checked the world stone to find out that currently it's the same as the outside of the pebble, a pure blank space of white.

In the beginning stages of my power since I don't understand how a world works, it would sort of autofill the rest of the details according to what's in my head. Like for the white space I think it should just be a singular large room since that would be easier to make, the moment I thought of it, and boom, nope, there was no special sound or even transitions. The white space like a frame in a video just blinked into a large 10 by 10 by 10 meter room.

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The more I thought of what should be in to room the more stuff was added to it, like a bed, a closet, a study desk, a pc setup along with a refrigerator with infinite food, which apparently can be added to the fridge as a permanent feature of it, meaning I don't have to update the food again and again(because I wanted to test the food).

I got to know that the food tasted as real as it could get. Aside from the main ability, I seem to have multiple side abilities that are just as broken. I have a storage space with time stopped in which I can only put sand and the head of a seagull cuz I'm still on this island of sand. Another ability is my body not needing to eat or anything human related other then looking like a human so I could pretty much turn into whatever I have proper data and knowledge of, which is why I'm currently in my human form cuz I've lived with this body.

I just had a brilliant idea, but first I'll need to confirm it. I pick up the head of the seagull much to my disgust of the blood dripping down the decapitated head and try to put it into the storage space and it works. Another thing is that since my body contains the storage space as a part of it, I can sort of scan the items inside it, so I scan the seagull head to see if my idea would work. I'm currently being bombarded by the memories of the seagull (that are stored in the brain), and it's not a pleasant feeling. Lucky for me this only lasted a few seconds on accounts of me being able to custom make illusion world (meaning the fruit also granted me higher processing power). I've basically lived the short life of the seagull of a year and half till its unsightly demise.

Lucky for me this seagull in particular has passed my an island before coming in this direction, an island with a human town. The sun's starting to go down and I don't want to stay on this island any longer, so I transform into a seagull, quite specifically the same seagull whose head I've got in my storage space and fly off at a high altitude (50m) towards the island.

I didn't have trouble flying as I already experienced it, with information that I got. It takes me a proper 1 hour to finally see the island on the horizon, takes me another 15 minutes to get to it. The town that I saw on the island was a fishing town with a lot of boats docked at the port. Seeing as it's night now and me going to any area would be met with suspicion, I'll just sleep in the seagull's nest for the night and try going around for information tomorrow. And so my first ends with me sleeping in an empty nest in the body of a seagull.