Permafrost Silethos
Titles Frozen Claw Wyvern
Nicknames Permafrost Sil, Ice Sil
General Info
Species Fanged Wyvern
Habitats Arctic Ridge, Frozen Seaway, Polar Sea, Tundra
Size Longest: 2091.46 cm
Shortest: 1523.78 cm
Relatives Silethos
Signature Move Ice Claws
Elements Element Ice Ice
Ailments Element Ice Iceblight
Weaknesses Element Fire Fire
Creator MonsterHunterFlacko

Permafrost Silethos (シレトス亜種, Shiretosu Ashu) is a Subspecies of Silethos.


Permafrost Silethos appear mostly the same as their common relatives, the only difference being their light blue hide with black rosettes and white scales. There claws and teeth are made of ice.


Permafrost Silethos are unique as their claws are, rather than being made of the usual flint-like material, are made of solid ice that never melts. Wounds inflicted by these claws are said to become affected by frostbite.


Permafrost Silethos exhibit the same behavior as their common relatives, right down to mating rituals.


These Wyverns are often seen inhabiting cold areas such as the Snowy Mountains, the Tundra, and the Frozen Seaway.



A Silethos Subspecies with claws and fangs made of ice that never melts. A single touch from these claws or teeth can freeze anything.


  • Order: Saurischia
  • Suborder: Four Legged
  • Superfamily: Ice Claw Wyvern
  • Family: Silethos

Permafrost Silethos and its common relative are of the Fanged Wyvern class. This monster class includes Zinogre, Stygian Zinogre, and Komodon.

Habitat Range

Permafrost Silethos are exclusively found in harsh, cold areas such as the Tundra, the Snowy Mountains, the Frozen Seaway, and the Polar Sea.

Similarly to regular Silethos, Permafrost Silethos are an invasive species of unknown origin.

Ecological Niche

Permafrost Silethos share the same ecological role as their relatives, asserting themselves as apex predators with little to no competition. They feast on the likes of Popo, Bullfango, and Anteka and even eat lesser predators such as Zamite, Giaprey and their Giadrome leader, Baggi and their Great Baggi alpha male, Lagombi, and Pokara.

Despite their ferocious and fearsome disposition, they do have to compete with monsters like Zamtrios, Khezu, Red Khezu, Gigginox, Baleful Gigginox, Barioth, Jade Barroth, Deviljho, Brachydios, Stygian Zinogre, Glacial Agnaktor, Tigrex, Tidal Najarala, Anorupatisu, Giaorugu, Pokaradon, and Elder Dragons such as Kushala Daora. The massive Gamuto is also a potential threat. Despite the tough competition, Permafrost Silethos can and will prove itself to be more than a threat to these predators.

Biological Adaptations

Unlike the flint claws and teeth of its common counterpart, Permafrost has fangs and claws made out of ice that will never melt. This is caused by a special fluid in the Wyvern's body that keeps the ice at freezing temperature to prevent it from melting. These claws and teeth are said to inflict wounds that become affected by frostbite.


Permafrost Silethos are known to exhibit the same behaviors as standard Silethos, from hunting habits to breeding behaviors to purposely challenging and fighting other monsters.


  • The prefix "Permafrost" was chosen to reflect this monster's frozen claws and fangs.
  • Permafrost Silethos's claws and teeth can be broken.
  • When low on stamina it will feed on Popo or Anteka to regain stamina.
  • Permafrost Silethos's roar requires Earplugs to block.