One Piece: My Animal Devil Fruit

How powerful will the protagonist possess who can transform ordinary animals into Devil Fruits and be able to take unlimited amounts of the Devil Fruits he has transformed? What kind of power will the various shells on Sky Island have when converted into Devil Fruits? Those monster-like animals that Luffy met in 3d2Y, what kind of power will the transformed Devil Fruit have? What kind of power will the soul creature created by Big Mom on Cake Island transform into a Devil Fruit? And when the protagonist uses his own grafted fruit to create a mythical creature, how powerful will the converted devil fruit gain? Note: In addition to eating the Devil Fruit he created, the protagonist can also eat an ordinary Devil Fruit. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.