The Erebus Volcano is a location far into the lands of the Jango Region. The name comes from Lord Erebus, an old noble whose holding was near the Volcano.
- Base Camp: Set between a cliff and a flow of lava, hunters and nyanters arrive either by dropping from a balloon or using the Eltalite Ship.
- Area 1: An incinerated forest, many dead trees litter the way, making for perfect height advantages.
- Area 2: A cave inside the volcano, large lava lakes surround this area.
- Area 3: Another cave, limited by rock on the south and a massive river of lava to the north, there's a lot of ledges here.
- Area 4: An ascending path with a Wyvern nest on the top.
- Area 5: A cracked rock path running along a stream of lava, a lavafall comes down from the cliffs, with a small stone bridge used to walk above it.
- Area 6: Another cracked rock path continuing along the lava stream.
- Area 7: A flat land on the northern portion of the massive lava river.
Small Monsters usually seen in these areas include Wroggi, Uroktor and Kelbi.
Large Monsters include Agnaktor, Great Wroggi, Basarios, Gravios, Deviljho, Shogun Ceanataur, Lavasioth, Rajang, Brachydios, Volvidon and Tetsucabra.
Elder Dragon sightings include Kirin, Teostra, Lunastra and Hokari Kodora.
- Far into the heart of the volcano lies the Erebus Core.
The Erebus Waste is the Erebus Volcano many years into the future, the layout is intact, but the lava has been replaced by toxic green slime, this allowed the Guild to realize an experiment on artificial ecosystems, with the help of the guild knights and g rank hunters, they led a large monster related to Akantor with the ability to use a slime similar to Brachydios' into the now habitable Volcano's mouth, and caving a path for prey to reach the sector, each Cold Season a drop of assorted dead herbivores is delivered to the monster via Eltalite Ship to prevent it from wandering out.
The experiment proved successful as new exotic species appeared in the years to come, ranging from the raptors Vanaggi and Great Venaggi, along with many other species adapted to the toxic environment.