One Piece's Wano Country arc saw the introduction of quite a lot of powerful Devil Fruits as the story tackled its biggest war involving the Straw Hat Pirates to date.
With the mighty Beasts Pirates and the forces of Wano up against the alliance, fans saw quite a few majestic powers get introduced in the arc. The majority of the Devil Fruit powers to get introduced in the arc were Zoans, as expected of an arc based around Kaido and his crew, with a few Paramecia types sprinkled around as well.
10 Uo Uo no Mi, Model: Seiryu
One of the strongest Devil Fruits in the One Piece world and possibly the strongest in the Zoan class, Uo Uo no Mi, Model: Seiryu is a Mythical Zoan that belongs to Yonko Kaido.
This Devil Fruit is quite powerful and it allows him to transform into a giant dragon and its hybrid form at will. Using its powers, Kaido was able to fight the Red Scabbards, followed by the Worst Generation, and then Luffy for hours before finally being defeated.
9 Ryu Ryu no Mi, Model: Pteranodon
Ryu Ryu no Mi, Model: Pteranodon is an Ancient Zoan type of Devil Fruit that was eaten by one of the Three Disasters of Kaido, King the Wildfire. This Devil Fruit allows him to transform into a giant Pteranodon and its hybrid at will.
It also gives him the power to launch giant slicing attacks with his wings, along with giving him the ability to pierce through his targets. As with all the Zoans, this Devil Fruit grants King great physical prowess.
8 Ryu Ryu no Mi, Model: Brachiosaurus
Eaten by Queen the Plague, one of the Three Disasters of Kaido, Ryu Ryu no Mi, Model: Brachiosaurus is also an Ancient Zoan type of Devil Fruit. It gives Queen the ability to transform into a giant brachiosaurus at will and also access a human-beast form.
With the immense weight that the brachiosaurus carries, Queen was even able to hurt one of the Yonko, Big Mom, in combat. This Devil Fruit grants him incredible physical prowess and makes him one of the toughest people to take on in combat.
7 Ryu Ryu no Mi Other Models
Apart from the models already discussed, the Ryu Ryu no Mi Also had quite a few other models introduced in the Wano Country arc. These mostly include the devil fruits of the Tobi Roppo such as Ulti's Pachycephalosaurus model, Page One's Spinosaurus model, and Sasaki's Triceratops model.
All these Devil Fruits are quite powerful and allow their users to transform into the said creatures and their hybrids. They also gain the standard Zoan powers of great recovery rates and tremendous physical power.
6 Neko Neko no Mi, Model: Saber-toothed Cat
The Neko Neko no Mi, Model: Saber-toothed Cat is an Ancient Zoan Devil Fruit that was eaten by one of the Flying Six of Kaido, Who's Who. This Devil Fruit grants him the ability to transform into a saber-tooth cat and its hybrid at will.
In the fight against Jinbe, fans saw the capabilities of this fruit and it was quite clear that it granted Who's Who tremendous physical powers. This fruit is superior to Rob Lucci's Neko Neko no Mi, being an Ancient Zoan.
5 Inu Inu no Mi, Model: Okuchi no Makami
Eaten by Yamato, Inu Inu no Mi, Model: Okuchi no Makami is a Mythical Zoan type of Devil Fruit. This fruit was procured by Kaido at an unknown time and eaten by Yamato during a hungry fit.
It allows the user to transform into a wolf deity and its hybrid form at will. Yamato can also control glacial powers with this fruit, as seen when the fight against Kaido raged on Onigashima's rooftop.
4 Toki Toki no Mi
Toki Toki no Mi is one of the very few Paramecia-type Devil Fruits introduced in the Wano Country arc. It was eaten by Amatsuki Toki, Who later ended up becoming the wife of Kozuki Oden. This Devil Fruit allowed Toki to send anyone, including herself, into the future, however, returning to the past was deemed impossible.
Its powers were seen being used when Toki jumped forward in time from the Void Century and later when the Scabbards and Momonosuke were sent to the future.
3 Tama's Devil Fruit
Tama ate her Devil Fruit at an unknown time. Just like Toki's Devil Fruit, it also belongs to the Paramecia class and allows her to produce millet dumplings from her cheeks.
Any animal or a smile devil fruit user eating the dumplings immediately becomes her servant. This Devil Fruit was seen being used quite early in the Wano Country arc. During the war of Onigashima, it was used to turn the tides of numbers in the favor of the alliance, thanks to Otama's plan.
2 Maki Maki no Mi
Eaten by Raizo of the Mist, Maki Maki no Mi is a Paramecia Devil Fruit that allows him to produce scrolls for various purposes at will. Raizo can use the scrolls to store anything he wants and then restore the objects stored at a later time.
This was seen when he wrapped his scrolls around Kaido and stored his Borobreath inside, only to return it to him moments after. During his time on Zou, he stored the bathwater from Zunesha and later used it to put out the fires on Onigashima.
1 Hebi Hebi no Mi, Model: Yamata no Orochi
Another Mythical Zoan type of Devil Fruit, Hebi Hebi no Mi, Model: Yamata no Orochi was eaten by Kurozumi Orochi. This fruit gave Orochi the power to transform into a giant eight-headed serpent.
Although the fruit is powerful, Orochi's lack of combat ability makes it useless. It also offers eight lives to the user, one stored in each head. Essentially, the user needs to be killed 8 times to be killed off properly.