#Kumo Kumo no Mi, Model: Rosamygale Grauvogeli
The Kumo Kumo no Mi, Model: Rosamygale Grauvogeli is an Ancient Zoan-type Devil Fruit that allows the user to transform into a hybrid and full version of a Rosamygale grauvogeli, a spider from the Triassic period. It was eaten by Black Maria.
The user of this fruit gains the abilities of a spider, most notably the ability to shoot webs out of their body; these webs are strong enough to easily trap and capture even powerful fighters like Sanji. Additionally, the user can walk on walls and ceilings with their spider legs. Although the real-life Rosamygale grauvogeli was under a centimeter in size, this fruit’s transformation appears to be proportionate to the size of the user’s body, which in Black Maria’s case causes it to dwarf normal-sized humans.
#Neko Neko no Mi, Model: Saber Tiger
The Neko Neko no Mi, Model: Saber Tiger is an Ancient Zoan-type Devil Fruit that allows the user to transform into a hybrid and full version of a saber-toothed tiger, a powerful, carnivorous predator from the prehistoric era, at will. It was eaten by Who’s Who, an already large man, who grows to a much bigger size in his full-beast form, appearing to dwarf his subordinates and the large fish-man Jinbe.
#Hebi Hebi no Mi, Model: Yamata no Orochi
The Hebi Hebi no Mi, Model: Yamata no Orochi is a Mythical Zoan-type Devil Fruit that allows the user to transform into a hybrid and full version of the Yamata no Orochi, an eight-headed serpent.
It was eaten by Kurozumi Orochi, but after his death at the hands of Kaido, the fruit has returned into circulation.
This fruit grants the user eight separate, extremely long-necked heads, each one capable of speech on their own. It appears that the user has some degree of control about the number of heads that can sprout at once, with eight being the maximum limit. Curiously, some of Orochi’s human form features, such as his crown and mustache, are present only in one of the heads.
In this form, the user is able to bite opponents with a considerable amount of strength and range, the latter due to the elongated necks.
The user also has a fair amount of durability in their transformed state, with Orochi being capable of sustaining damage from a ceiling collapsing on his head with few repercussions.
#Zou Zou no Mi, Model: Mammoth
The Zou Zou no Mi, Model: Mammoth is an Ancient Zoan-type Devil Fruit, which allows the user to transform into a mammoth hybrid and full mammoth at will.
It was eaten by Jack, who’s an All-Star of the Beasts Pirates, one of Kaido’s three right-hand men, known as the Disasters, and the captain of the Mammoth.
The full mammoth form granted by this fruit gives the user a massive frame, significantly increasing Jack’s already abnormal size. Jack can level buildings with a single swing of his trunk and leave imprints of his feet on the ground just by stepping on it.
#Ryu Ryu no Mi, Model: Brachiosaurus
The Ryu Ryu no Mi, Model: Brachiosaurus is an Ancient Zoan-type Devil Fruit that allows the user to transform into a brachiosaurus hybrid and a full brachiosaurus at will, granting him an immense boost to size and bulk. The user’s immense weight can be used as a weapon, as very little will be able to withstand the crushing pressure of their massive transformed body.
It was eaten by Queen who’s one of Kaido’s 3 Disasters. It has been implied that Queen is even stronger than the extremely powerful Jack.
#Ryu Ryu no Mi, Model: Pteranodon
The Ryu Ryu no Mi, Model: Pteranodon is an Ancient Zoan-type Devil Fruit that allows the user to transform into a pteranodon hybrid and a full pteranodon at will.
It was eaten by King, who’s supposedly the strongest Disaster of the Beasts Pirates.
A user of this fruit’s power is able to turn into a pteranodon, a large and powerful, flight-capable reptile from the prehistoric era. When transformed, they become able to travel through the air at tremendous speed, covering large distances within short time spans, and enjoy a significant boost to their overall physical parameters, as to be expected of a predatory Ancient Zoan type. Additionally, the full-beast form as displayed by King is notably big, several times larger than an average-sized human (though it is worth noting that King is already much larger than normal people in his humanoid form).
The combination of great (flight) speed, strength, and size conferred by the transformation allows the user to cause notable damage to whatever they fly into beak-first, both to objects and living beings, their beak representing a strong and sturdy pointed weapon.
#(Unknown mythical model of) Uo Uo no Mi
The Mythical Zoan-type of the Uo Uo no Mi is a Devil Fruit that allows the user to transform into a hybrid and full version of an Eastern dragon at will. It was eaten by Kaido.
The user is granted multiple supernatural abilities. The most prominent of them is the ability to create flame-shaped clouds to travel airborne, using them as footholds.
Additionally, the user gains access to multiple varieties of elemental attacks they can perform with their mouth. The most common of these is a concentrated blast of fire which can travel many kilometers in the span of seconds and instantly destroy entire structures and landmasses that it hits. Additionally, the user can generate small lightning bolts while roaring and launch blades of wind while blowing. With these attacks being able to travel great distances, the user can overwhelm opponents in battle by hovering in the air out of their reach and assaulting them with attacks.
