One Piece: Blackbeard's double fruit ability is not a physical problem? Oda has already hinted!
In One Piece, the devil fruit is a rare treasure, the eater can obtain a superpower that is different from ordinary people, and humans know very little about it, after a long period of understanding, only know that the devil fruit is divided into three categories, natural, superhuman and animal, and a person can only eat one fruit, eat more will explode and die, and the side effect is that it is impossible to swim.
However, in the battle of the top war, Blackbeard broke people's traditional cognition of the Demon Fruit, because he had already eaten the Dark Fruit, and later after Whitebeard died, Blackbeard covered his body with a layer of black cloth, and did not know what means were used, but directly absorbed the Shock Fruit, and since then he has become a double fruit ability. So far, there has been no definitive answer to the mystery of why he was able to absorb the two demon fruits.
At present, the most recognized statement is that Blackbeard's own physique is special, because it has been mentioned in the data that he basically does not need to sleep, so some people speculate that there are two souls in his body, one appears in the morning and one appears at night, so he eats two fruits without exploding and dying, and even some people start from the three-headed dog of the pirate flag hell, thinking that he can get three demon fruits!
However, with the truth of Luffy's rubber fruit exposed, there seems to be a new explanation for the secret that Blackbeard can absorb two demon fruits. Originally, the classification of rubber fruits belonged to the superhuman line, but after awakening, it was told that it was the human fruit of the animal line, and more importantly, if the rubber fruit was originally animal, but the world did not know its true face, it would be understandable.
It is strange that after the awakening, the rubber fruit not only has the characteristics of the superhuman system, but also the characteristics of the animal system, and even has a certain similarity with the natural system (random change of body). This makes people have to wonder, what classification of the demon fruit, what side effects, what ability, what taboos, may not be a real law of the demon fruit itself? That is to say, everything is nothing but the result of human beings' own groping.
Therefore, there is a good chance that there is a difference between the demon fruit individuals, just like Ka'er's glutinous fruit, which is both superhuman and has some characteristics of the natural system, as well as Luffy's rubber fruit. Therefore, will the dark fruit of Blackbeard also have a characteristic of its own existence? For example, can it be compatible with other fruits?
If this is the case, there are many foreshadowings that can be explained clearly, such as Blackbeard waiting for twenty years, why is it necessary to be a dark fruit? It must be that he had seen the Demon Fruit Atlas and knew that the Dark Fruit was able to absorb two fruits, but people had always thought that a person could only eat one Demon Fruit, so no one dared to joke about his own life, which made him doubtful about the Dark Fruit.
There is also the reason why Blackbeard wrapped Whitebeard with a black cloth when he absorbed the Shock Fruit, because the way he got the Shock Fruit was not to eat the Demon Fruit normally, but to use the Dark Fruit to absorb the remaining fruit ability of his body. At the same time, the individual differences in Luffy's rubber fruits today can also be regarded as hints made by Oda.