Raging Brachydios Topics:

ItemIcon006 Disclaimer:

This is merely a plausible explanation for the monster(s) in this article, and may or may not be considered canon to the series.

In-Game Information

MH4U-Raging Brachydios Icon


  • Order: Saurischia
  • Suborder: Theropoda
  • Superfamily: Forefoot Fist Wyvern
  • Family: Brachy

Theorized to have grown isolated in a special environment, Raging Brachydios is a rare special Brachydios individual that has abnormal activation of its Slime Mold. Like Brachydios, Raging Brachydios is a part of the Brute Wyvern class.

Habitat Range

Raging Brachydios have only been documented in the Ingle Isle thus far.

Ecological Niche

Raging Brachydios is a predator capable of taking on and even killing other large predatory monsters, just like Brachydios. However, Raging Brachydios have to deal with much tougher foes like Akantor, Teostra, Furious Rajang, and even the rare Crimson Fatalis.

Biological Adaptions

Raging Brachydios have many of the same adaptions as Brachydios, however, there is a few differences between them. Raging Brachydios are unusually large compared to normal Brachydios plus are slower than them. The main adaption that puts them apart from normal Brachydios is the large amount of slime mold found on their body. This slime mold is unusually active on its forelegs, tail, back, and head due to a strange organ known as the Immortal Reactor. This organ has a special relationship with the slime mold plus supposedly helps the Brachydios live longer. This organ is the reason why the slime mold is so active compared to normal Brachydios, making its attacks more powerful and making the slime mold breed more rapidly than before.


Raging Brachydios are a lot more dangerous than Brachydios yet slower. Due to this the Raging Brachydios makes up for the lack of speed for more powerful physical attacks.