| Category | Strongholds |
| Continent | Brucrumus |
| Region | Imgangreth |
| Built | 3 Temporal 228 GE |
| Map | Kazgon |
Quelmollendë was built in the Demon Spawn War (89 GE - 269 GE) by Covenant forces under Polyxo. With skills better suited to the lab than the battlefield, Quelmollendë became Polyxo's personal lab. In collaboration with Silvanus, they created the Myconid race. Polyxo's other notable creations at Quelmollendë are the Derro, first carrion crawlers and ochre jellies.