| Category | Swamps |
| Continent | Brucrumus |
| Region | Grashakh |
| Map | Mirtheon |
The Droonesh swamp is east and north of the Hangath Forest. Reeking of rotting vegetation, its waters are black and murky. The blackness is caused by vegetation which colors the water as it rots. These same weeds are used as dyes.
Droonesh is known for its swarming insects and wandering mindless undead. The latter are the work of cults and student camps out of Argruxiel, practicing their dark arts away from population. Some of these practitioners remain in Droonesh, a few swallowed by darkness, become villains, selling their work to the Orchish Empire's Ebonweird division.
The trolls of this area have been here longer than any other. Most are descendants of an army that had once served under Maglubiyet. In the Demon Spawn War (8972 GE - 9493 GE), this army was nearly wiped out when it was caught between two demon armies, one serving Demogorgon and the other serving Baphomet. When the demons scattered Maglubiyet's army, they turned on each other. After the demons armies were nearly wiped out, Maglubiyet's trolls emerged from the bog, finishing them off. The trolls of Maglubiyet's army remained in the swamp, while the goblin units fled into Bowkrak, Hangath, and neighboring areas.
From the north, the swamp is fed by the Umgaril River. This waterway is a trade route between Valangrim and the swamp city of Argruxiel. Droonesh drains to the southwest, becoming the headwaters of the Glumgard River.