Devil Fruits are a major source of power and the primary power system in One Piece. Introduced quite early with Monkey D. Luffy, the protagonist, Devil Fruits have only gone on to become more powerful and complicated with time. Over the years, some mighty pirates have emerged with terrific Devil Fruit abilities, however, none have had the impact that Yonko Blackbeard has had in the story with their powers. Blackbeard is a user of two of the most powerful Devil Fruit and also the only person in history to wield more than one Devil Fruit ability.
Somehow, he has figured out a way to consume more than one power and, at the same time, steal abilities from others. Following the timeskip, Blackbeard was revealed to be on a hunt for powerful Devil Fruits for his crewmates. Fans have already witnessed quite a few of them, with Shiryu's Suke Suke no Mi, and Katarina Devon's Inu Inu no Mi, Model: Kyubi no Kitsune. After the conclusion of the Wano Country arc, fans witnessed Blackbeard launch an offensive on Trafalgar Law, and as the two groups tussled for supremacy in the New World, a lot more Devil Fruit powers of the Blackbeard Pirates were revealed.
Jesus Burgess' Riki Riki No Mi
One of the most impressive Devil Fruits to be revealed in the previous chapters of One Piece was Riki Riki no Mi, which was eaten by Jesus Burgess at an unknown time. It is likely that he gained the power of this Devil Fruit after the events of the Dressrosa arc as he was not seen using its power during his fight against Sabo. Where he acquired this power from remains unknown, however, it is certainly incredible, to say the very least.
The Riki Riki no Mi is a Paramecia type of Devil Fruit that grants tremendous amounts of strength to Jesus Burgess. In application, this fruit is quite simple as it simply increases the strength output of the user manifold. By using its powers, Burgess was casually able to lift an entire mountain and hurl it towards Law. There's likely going to be a limit to how much he can increase his strength using this Devil Fruit, however, fans can rest assured that he has not shown his true powers just yet. Burgess is certainly many times stronger now than he was during the Dressrosa arc. After all, he's the Captain of the First Ship of the Blackbeard Pirates and most likely the future opponent of Jinbe, the Helmsman of the Straw Hat Pirates.
Van Augur's Wapu Wapu No Mi
Quite possibly the most intriguing Devil Fruit out of all the new ones introduced in the previous chapters is the Paramecia type that was eaten by Van Augur, the Wapu Wapu no Mi. This Devil Fruit is very different from Burgess' fruit and it does not grant a strength boost, but still makes Augur several times more dangerous and also allows him to act as a great support character for the members of the crew. Simply put, the Wapu Wapu no Mi allows Van Augur to warp anything to a given location instantly.
Most likely, this location has to be within his range of sight, as seen in the previous chapter when he teleported other members of his crew to a nearby island. This ability most likely also works on himself and, as such, Van Augur is one of the fastest characters in the story right now. While he has not been seen using it to the fullest, fans saw him utilize its powers in incredible ways when he fought the Heart Pirates and, later, Usopp of the Straw Hat Pirates.
Doc Q's Shiku Shiku No Mi
Out of all the Devil Fruits introduced in the previous chapter, the one eaten by Doc Q, the Shiku Shiku know me, is most likely the most fearsome one. It is a Paramecia type of Devil Fruit that suits the very nature of Doc Q's character. The Shiku Shiku no Mi allows him to create various diseases and inflict them on others. This ability was seen and action in the previous chapter when he used Malady to transform Trafalgar Law and his crewmates into women.
His diseases can be contagious, as was seen in the previous chapter, and, most likely, require some sort of contact to work. Undoubtedly, he has some really deadly diseases under his belt and will utilize them later on in the series when he fights Chopper of the straw hat pirates. The true potential of his ability is massive and fans will truly see it as the story continues. Like any other Devil Fruit power, this one can also be countered by applying a great deal of Haki.
Stronger's Uma Uma No Mi, Model: Pegasus
Stronger is the horse that Doc Q is usually seen riding. The horse looks quite sickly, yet, serves as a fighting member of the crew. While fans didn't expect Stronger to have a Devil Fruit ability, the previous chapter confirmed that he has, indeed, eaten one of these mystical fruits. Stronger as a user of the Mythical Zoan class of Devil Fruits. It was revealed that he has eaten the Uma Uma no Mi, Model: Pegasus. Expectedly, this Devil Fruit allows him to transform into a Pegasus and its hybrid at will. He was seen carrying the likes of Blackbeard and Doc Q to an island to fight Law. As with all Zoans, this fruit most likely grants Stronger a strength and stamina boost, along with increased resilience. While he does have a rare Devil Fruit ability, Stronger most likely only acts as a support for Doc Q in combat.
Evidently, the Blackbeard Pirates have acquired some very powerful Devil Fruits and they will most likely keep on honing these abilities until they gain a perfect grasp over them. Fans might see more of these abilities in the coming chapters and, ultimately, use them in full force when the Blackbeard Pirates inevitably clash against the Straw Hat Pirates.