Blackbeard Pirate Regiment is a rapidly rising pirate regiment in the new world, as the only "double fruit ability" at sea, Blackbeard's personal strength has long been different. Looking back at the previous plot, the biggest prop to help Blackbeard is undoubtedly the "Dark Fruit", which contains abilities that are unmatched by other fruits, and Blackbeard originally subdued Ace only by virtue of the ability of the Dark Fruit. Thinking that Ace was able to compete with Yamato and Even Five-Five Characters, it can be seen how strong Blackbeard who obtained the Dark Fruit had reached.
However, unexpectedly, Blackbeard met Magellan after entering the Advance City, and thought it would be a "protracted war", after all, on one side was the "King" of the Advance City, and on the other side was the "Ambitionist" who had the ability to absorb any fruit, but he did not expect that this battle Oda did not describe too much, leaving only the result of Blackbeard's fiasco. Why didn't Blackbeard even have the ability to fight Magellan? Could it be that the Dark Fruit could not absorb Magellan's fruit power? Let's take a brief look at it with me.

The side effects of the dark fruit make Blackbeard's body unbearable
Although the ability of the Dark Fruit is very special, there are also special "side effects", that is, to make the ability bear more damage than ordinary people in battle. In the battle with Ace, in addition to the powerful Dark Fruit ability, what Blackbeard shows is the picture of "rolling all over the ground". Ace's burnt fruit can not cause fatal damage to Blackbeard, but it still makes Blackbeard unbearable pain, which shows that the side effects of Dark Fruit cannot be ignored.
Magellan's fruit ability is "toxin", which can release poison gas, venom and other attacks at will, and once the enemy gets half a toxin, it will instantly lose its combat effectiveness and be tortured for a long time. Ordinary people could not tolerate Magellan's toxin attack, let alone Blackbeard, who needed to bear several times the damage. I have to admit that Magellan's fruit ability is indeed powerful, so Blackbeard's fight may be caused by the side effects of dark fruit.
The use of the Dark Fruit was not skilled enough to deal with Magellan's attacks
If it is not a side effect of the dark fruit, then there is also a conjecture that Blackbeard's use of the dark fruit. Although Blackbeard defeated Ace with a fruit, he did not fuse with the Dark Fruit for a long time, and in addition to being able to show ordinary abilities, it seems that he has not yet developed the fruit to a higher degree, which means that Blackbeard's proficiency in the use of dark fruit is not enough.
On the other hand, Magellan's side has carried out a very high level of development of the fruit, and the "Poison Giant" after unlocking the seal is a rare "powerful move" in the One Piece world, which has a strong corrosiveness and will melt in a short time once encountered. Coupled with the narrow terrain of the city, Magellan was able to exert a stronger fruit ability. In other words, perhaps Blackbeard was not as skilled as Magellan in using the fruit, which affected his own strength, so it would end up in a fiasco.
Inflated arrogance, let Blackbeard look down on Magellan's strength
In fact, many sea fans do not think that it is a gap in strength, and the reason why Blackbeard loses is because of his own personality. As we all know, Blackbeard is a very arrogant pirate, this point has been "publicly" pointed out by Whitebeard in the top war, and inflated arrogance can be said to be Blackbeard's character flaw, so when Blackbeard fights magellan, perhaps it is only Blackbeard's conceit that looks down on Magellan, which leads to the instant being "seconds".
This speculation is also more agreed with by Haimi at present, after all, when both have a certain combat strength, it is impossible to divide the victory and defeat in a short period of time, so the reason why Blackbeard lost is that it is very likely that he will not look up to Magellan.
Perhaps Blackbeard was using his life to "gamble" on Hiryu's joining
The final conjecture is that Blackbeard was deliberately defeated by Magellan in order to gain the trust of Rain's Hiryu. It should be noted that Blackbeard was the first to see Hiryu and then defeated by Magellan. Blackbeard is a meticulous and unscrupulous pirate who has spent twenty years in the White Tuan for the sake of the Dark Fruit, so Blackbeard is likely to get a powerful subordinate, that is, "Rain No Hiryu" to join. How to quickly build trust between two people? That is "experiencing life and death.".
Only by handing over the "hole card" of his team to Hiryu, Hiryu will trust Blackbeard and join his team, which has a lot to do with Blackbeard's "gambling nature". Moreover, there is such a strange doctor as "Poison Q" in the black group, perhaps Poison Q has the ability to detoxify, and all this is just Blackbeard's plan, the purpose is to see Xi Liu's sincerity and determination to join the group.
Personally, I think that the possibility of the latter two conjectures is high, and I don't know how the small partner guessed it? Friends who like articles remember to pay attention to oh.