- Order: Saurischia
- Suborder: Theropoda
- Superfamily: Tail Blade Wyvern
- Family: Glavenus
Glavenus is a recently discovered species of Brute Wyvern, found by the Hunter's Guild. Alongside Glavenus, unusual Glavenus individuals have been found. These individuals are known as Hellblade Glavenus.
Glavenus is a top predator that will relentlessly chase down its prey. Glavenus have primarily been seen feeding on Larinoth, Apceros, and other Herbivores. Despite being a top predator, Glavenus has to compete with other large predatory monsters like Rathian, Malfestio, Agnaktor, and Zinogre. The Glavenus's only known predator is Nakarkos.
Glavenus's most striking feature is its blade-like tail. The blade-like tail is used in many ways by Glavenus such as keeping the body balanced but its primary use is for attacking. This tail can cut prey in two with a single slash, crack the ground easily, and even block some attacks. Though its tail is already a powerful weapon, it can become more dangerous once heated up. By grinding its tail on the ground or nearby hard surfaces violently, it can ignite the tail, heating it up to high temperatures. While its tail is heated all of its tail-based attacks become more deadly, also allowing it to cut through objects much more easily. Though its tail is more deadly while heated up, Glavenus's tail actually dulls quicker. When a Glavenus's tail is heated or dull, the tail actually becomes more vulnerable to attacks from threats. To solve this problem, Glavenus has evolved a unique behavior. During a battle, the Glavenus will actually put its tail in its mouth, between four specially designed fangs, before sharpening its blade-like tail. When not in the middle of a fight, it will occassionaly grind its tail against hard surfaces it finds. This restores the tail's sharpness and makes it brand new again, ready to be used in another battle. One might think that sharpening its tail would send sparks flying in its eyes, however, the hard shell covering Glavenus's face protects its eyes from sparks as it sharpens its tail. When Glavenus sharpens its tail, it is removing soot and ore from its tail and swallowing it. The swallowed soot and ore is accumulated into its special flaming bursa (a furnace-like organ) located in the throat.The soot and ore are then melted by the high temperatures of the flaming bursa turning the materials into molten magma. The magma produced by the flaming bursa can then be used as explosive projectiles or wan explode on contact or be left to detonate on their own when fired to the ground. Occasionally, Glavenus' spikes and some other portions of its body will turn red as they smoke with heat. This is from high body heat the Glavenus gives off. Despite Glavenus's size, it is actually fairly agile and can even jump in the air. On the back of its legs are two claws used to support its weight as it lands.
Glavenus are relentless, aggressive predators with surprising skills in battle. These skills have made hunters consider them to be one of the most intelligent Brute Wyverns around if not necessarily the strongest. Glavenus will drag its tail on the ground and roar at the foe. By dragging its tail, it shows the threat that it uses fire as a weapon to enemies. Their territory is commonly marked by large gashes on the ground, produced when they scrape their tails along solid objects.