Titles Hornless Wyvern
Nicknames Nulli
General Info
Species Flying Wyvern
Habitats Desert
Old Desert
Sandy Plains
Wildspire Waste
Size 2315.60 cm
1553.35 cm
Relatives Gray Nulliblos
Bloodbath Diablos
Gilded Diablos
Black Diablos
Killerspear Monoblos
Shattered Monoblos
White Monoblos
Lavalord Gravios
Black Gravios
Firepower Black Gravios
Crystal Basarios
Ruby Basarios
Igneous Basarios
Sandstone Basarios
Signature Move Flying Headbutt
Elements N/A
Ailments N/A
Weaknesses Element Ice Ice
Creator MonsterHunterFlacko

Nulliblos (ヌリブロス, Nuriburosu) is a Flying Wyvern.


Nulliblos looks similar to its relatives Diablos and Monoblos with a tan armored shell covering its body. It has a short, compact frill that is lined with spikes and a beak-like mouth with fang-like protrusions. Nulliblos's tail ends in a spherical club that is covered in small spikes. What separates Nulliblos from its relatives is that Nulliblos lacks horns. It is also noticeably smaller than its cousins.


Nulliblos are adept diggers and can burrow underground and travel through the sand in their desert environment. They can fly using their thick, muscular wings, another trait that separates them from their relatives. Their roar is incredibly loud and is used to stun hunters and predators.



Nulliblos Icon by Chaoarren A desert-dwelling wyvern that is related to Diablos and Monoblos. They have no horns but make up for it with their rock-hard skulls, burrowing capabilities, and ear-splitting roars. A single headbutt from this wyvern can kill on impact.


  • Order: Saurischia
  • Suborder: Wyvern Feet
  • Infraorder: Heavy Shell Wyvern
  • Superfamily: Horn Wyvern
  • Family: Blos

Nulliblos is a Flying Wyvern that is closely related to Diablos and Monoblos. It also has a closely related Subspecies called Gray Nulliblos.

Habitat Range

In the Old World, Nulliblos inhabit the Desert, Dunes, Old Desert, and some parts of the Everwood. In the New World they inhabit the Sandy Plains, and were recently discovered in the Wildspire Waste.

Ecological Niche

Nulliblos, like its cousins, are herbivorous wyverns that feed on different types of desert vegetation, most commonly giant cacti. Nulliblos are always on the look out for these rare and succulent plants, which leads to frequent territorial disputes. Nulliblos occasionally come into contact with large predators such as Tigrex, Rathian, Seregios, Kuarusepusu, Deviljho, Glavenus, Sand Barioth, Akura Vashimu, Nibelsnarf, Odibatorasu, Hyujikiki, Teostra, and Kushala Daora.

Biological Adaptations

Nulliblos has the ability to burrow underground, just like its relatives. They can dig underground at over 50 miles (80 km) per hour, which causes tremors. Nulliblos and its kin are well-known for their sensitivity to high-pitched sounds due to their well-developed sense of hearing. They can also produce the same ear-splitting that can be heard from miles away. Nulliblos lack any kind of breath attack, but they more than make up for it with bone-crushing ramming attacks, courtesy of their powerful legs and rock-hard skulls. Their muscular wings also make them adept fliers and can fly for hours without having to rest. Its thick tail serves as a club for self-defense, capable of breaking rocks, and its hard shell is perfect for protecting Nulliblos from most attacks. Their frills are used mostly for thermoregulation, keeping it cool in its dry, arid environment. It also serves as a form of courtship display.


Nulliblos are nowhere near as aggressive as its relatives and would much rather avoid conflict. However, they can become just as aggressive when confronted by an enemy. Males use their frills as a form of courtship display; the larger a male's frill, the better chance he has at attracting a mate.


Low Rank (Village)

The Hornless Devil Lv ★★★★
Nulliblos Icon by Chaoarren
Hunt a Nulliblos
Reward: 3600z Location: Dunes
Contract Fee: 400z Time Limit: 50 min.
Subquest: Slay 5 Cephalos Sub.Reward: 600z
Other Monsters:

Apceros, Felyne, Konchu, Cephalos

Client: Sand Surfer

Yo, hunter! You seem like a capable one, so hear me out. I was out in the Dunes doing my usual sand surfing, having a good time. Suddenly I saw a bunch of smaller monsters passing by me, scared of something it seemed. Then I heard this loud roar, so I turned around. And there was this big monster! It looked very scary and its roar added to that. So, I got out of there as fast as I could. So, go take care of that thing so I can go back to my surfing, man!

Dirt Devils Lv ★★★★★
Nibelsnarf Fanon Icon Nulliblos Icon by Chaoarren MH4U-Unstable Quest Icon
Hunt a Nibelsnarf and a Nulliblos
Reward: 6000z Location: Desert
Contract Fee: 600z Time Limit: 50 min.
Subquest: Mount and topple Nulliblos twice Sub.Reward: 900z
Other Monsters:

Apceros, Remobra, Vespoid, Great Thunderbug, Glavenus

Client: Desert Wanderer

I was doing my usual wandering through the desert, peaceful like always. But it stopped being peaceful when I nearly got eaten by a Nibelsnarf! As I was running away the Nibelsnarf was chasing me, still trying to chomp me up. This went on for sometime, until we ran into a sleeping Nulliblos! It woke up immediately and roared in anger! I can't do my peaceful wandering with those devils around! Get rid of them!

Low Rank (Hub)


Low Rank (Event)

Size Doesn't Always Matter Lv DLC 3★
Nulliblos Icon by Chaoarren Monoblos Fanon 4th Gen Icon
Hunt a Nulliblos and a Monoblos
Reward: 9600z Location: Everwood
Contract Fee: 1000z Time Limit: 50 min.
Subquest: None Sub.Reward: None
Other Monsters:

Aptonoth, Conga

Client: Ace Commander

A strange phenomenon has occurred in the Everwood. Usually the Nulliblos is smaller than its other Flying Wyvern cousins, the Monoblos and Diablos. But there have been reports of an unusually massive Nulliblos and an unusually small Monoblos. We need you to take of both of them as they're causing a lot of problems. Get out there now!

  • Notes:
  • The Nulliblos in this quest will always be Gold Crown Large and the Monoblos will always be Gold Crown Small.
  • This quest rewards a Bronze Guild Ticket upon completion.

High Rank (Village)


High Rank (Hub)


High Rank (Event)


G-Rank (Hub)


G-Rank (Event)



Nulliblos's name is derived from nulli-, a Latin prefix meaning zero, as Nulliblos has no horns.


  • Nulliblos is inspired by hornless ceratopsians such as Protosaurus, Psittacosaurus, and Yinlong.
  • Its head, back, and wings can be broken. The tail can be severed.
  • When low on stamina it will trip after charging.
    • It will feed on cacti to recover stamina.
  • Nulliblos's roar requires HG Earplugs to block.