The Great Ossuary
The Great Ossuary is an island in The Ossuary Reaches. Grey islands of bone and ash where the dead of every war at sea were laid down, and got up again. They march in legions.
This region is for Captain's Subscription holders. Without one, the sea turns you back at its edge.
Creatures
| Monster | Level | Number | Where | Respawn | Drops |
|---|---|---|---|---|---|
Bone Knight | 114 | 12 | (-30, -18) | 45 s | |
Charnel Giant | 124 | 8 | (8, -48) | 45 s | |
Grave Wraith | 128 | 10 | (26, -10) | 45 s | |
Island boss: The Lich-Lord Morvath

The Lich-Lord Morvath, a level 135 boss with 36,450 health (attack 310, defence 101). It turns up every 4–8 minutes at one of 5 spots on the island, using its drain attack pattern. Worth 12,150 XP and 4,050–9,450 gold.
| Item | Quantity | Rarity | Chance | Roughly |
|---|---|---|---|---|
Ring of the Bone King | 1 | Common | 30% | 1/3 |
Bonewrought Cuirass | 1 | Uncommon | 15% | 1/7 |
Bonewrought Greatsword | 1 | Uncommon | 10% | 1/10 |
Jumping puzzle: The Bone Buttresses

The Bone Buttresses: a frost climb of difficulty ★★★☆☆ up the island's landmark (79.30 m high). 41 platforms, 2 checkpoints. Some platforms move, spin or vanish on a timer: watch a cycle before you jump.
Start at (0, -66). The chest at the top holds 5,200 gold, 4,680 XP and
Ring of the Bone King. If you fall, you restart at the last checkpoint you touched. Each chest can be opened once per character; clearing puzzles counts towards achievements.
Hidden places & landmarks
| Place | Type | Where | Reward | Notes |
|---|---|---|---|---|
| The Great Ossuary Camp | Remote Settlement | (-36, -24) | 1 Dabloom | A camp on The Great Ossuary. Whoever lives here does not want visitors. |
| The Great Ossuary Heights | Landmark | (30, -52) | 1 Dabloom | The high ground of The Great Ossuary. You can see the whole region from here. |
Gathering
Fishing: 4 spots (tier 5). See Fishing.
Mining: 4× Bone-Iron Vein, 4× Marrowstone Vein. See Mining.
Quests
| Quest | Kind | Task | Target | XP | Gold | Skill |
|---|---|---|---|---|---|---|
| Hunt: 6 Ossuary Legionnaires | Hunt | Defeat 6 Ossuary Legionnaires. | Ossuary Legionnaire | 12,000 | 36 | Swordsmanship +15 |
| Hunt: 14 Ossuary Legionnaires | Hunt | Defeat 14 Ossuary Legionnaires. | Ossuary Legionnaire | 28,000 | 84 | Swordsmanship +35 |
| Hunt: 6 Marrow Archers | Hunt | Defeat 6 Marrow Archers. | Marrow Archer | 12,000 | 36 | Swordsmanship +15 |
| Hunt: 14 Marrow Archers | Hunt | Defeat 14 Marrow Archers. | Marrow Archer | 28,000 | 84 | Swordsmanship +35 |
| Hunt: 6 Howling Skulls | Hunt | Defeat 6 Howling Skulls. | Howling Skull | 12,000 | 36 | Swordsmanship +15 |
| Hunt: 14 Howling Skulls | Hunt | Defeat 14 Howling Skulls. | Howling Skull | 28,000 | 84 | Swordsmanship +35 |
| Hunt: 6 Bone Knights | Hunt | Defeat 6 Bone Knights. | Bone Knight | 12,000 | 36 | Swordsmanship +15 |
| Hunt: 14 Bone Knights | Hunt | Defeat 14 Bone Knights. | Bone Knight | 28,000 | 84 | Swordsmanship +35 |
Getting around
- Return to the ship → The Saltborne Sea
Bone Knight
Charnel Giant
Grave Wraith
Bonewrought Greatsword
Ossuary Legionnaire
Marrow Archer
Howling Skull