| Category | Marvels |
| Continent | Brucrumus |
| Region | Imgangreth |
| Alias | Tiwa'erra's Core |
| Owner | none |
| Built | unknown |
| Map | Kirgoyle |
According to the Einglach, in the Year 1020, an inky black object, glowing green and trailing a stream of emerald fire, crashed into Bathmulg. The impact rocked the area, setting off landslides and causing earthquakes as far as the High Wood Country. The sphere formed a mammoth crater and rested in its bowel for 21 days, before sinking into the soft clay and then downward through rock and stone. The hole it left in its wake came to be known as Mathongrargs Eye; named for the dragon that once terrorized the land above.
A Svirfneblin legend confirms this by saying the Ink Sphere fell through the roof, landing in a dry and barren cavern. But within months, the vast cavern sprung to life, with massive mushrooms, fungal stalks, and other fungal life forms spreading outward from the Ink Sphere. In several years, the entire cavern was covered with vegetation, decades later, the fungal forest had expanded outward in all directions for ten miles.
In time, Svirfneblin, Drow, and the Mîmêk built fabulous cities in the area. Rivers were diverted and channeled into the mammoth cavern. As the centuries passed, the races waged war over this fertile real estate. The more sinister aspect of the area was soon noticed in the people. They suffered hideous mutations, enough to scared off the Svirfneblin. The Drow and Mîmêk stuck around. They saw the mutations a blessing of their gods. After several generations, they were completely mutated, becoming aberrations and monstrosities.
Today, few intelligent races dwell in the vast cavern that houses this Ink Sphere. Its terrors include broken ones, stone trolls, ropers, and intellect devourers, all seemingly immune to the Sphere's mutations.
The Ink Sphere has a diameter of 1,100 feet. It radiates a green glow which seems to have a fertilizing effect on fungal plants, and a mutating effect on living creatures. It lies amid the Sphere Fungal.
In the early 1800's a science/adventuring team explored the area of the Ink Sphere. One of the members of this team, Kavdas Urkuzir, studied the Ink Sphere for almost two years, discovering it to be the lost core of Tiwa'erra.