| Category | Seam Barges |
| Class | Seam Barge |
| Builder | |
| Commissioned | unknown |
| Owner | unknown |
Before the Second Epoch, traversing a Seam Portal was an impossibility for all but the Earthen. This circumstance shifted with the emergence of specialized Mhornar Skree known as Nalgu Skree. This vessel type, extraordinarily costly to construct and operate, possesses the capacity to pass through Seam Portals in both directions. They acquire this upstream-traveling power from a specialized engine housing the energies of an exceptionally potent earth elemental.