Osseous
Osseous is a level 888 members monster found in Anachronia, with 350,000 life points. It is weak to Necromancy. It is the top source of Damaged dinosaur bones, Occultist's ring and Jail cell key.
“This boss fight needs fleshing out a bit.”
Level 888MembersAggressiveAttacks with necromancy
Updated . Stats and drops from the RuneScape Wiki's monster and drop data (CC BY-NC-SA 3.0), checked 2026-10-09. Wiki page. Item sprites © Jagex.
Combat stats
- Combat level
- 888
- Life points
- 350,000
- Combat XP per kill
- 17,500
- Max hit
- 3,129
- Armour
- 2,458
- Attack style
- Necromancy
- Weakness
- Necromancy
- Immune to
- Poison, Stuns
- Aggressive
- Yes
- Poisonous
- No
Slayer
- Slayer level
- None needed
- Slayer XP per kill
- 7,000
- Task
- Dinosaurs, Skeletons, Undead
- Assigned by
- Jacquelyn, Raptor, Vannaka, Laniakea
Where
Anachronia
Ironman notes
- Counts as a Slayer task from Jacquelyn, Raptor, Vannaka and Laniakea (task: dinosaurs, skeletons and undead). Killing it on task earns Slayer XP and points.
- Weak to Necromancy: bring that style for faster kills.
- Immune to poison and stuns.
- Aggressive: it attacks on sight, which is handy for AFK kills once your gear outclasses it.
- Always drops Damaged dinosaur bones and Dinosaur bones: Prayer XP as you go.
- 5 of its drops come noted, so they don't fill your inventory.
- It can also roll the shared rare drop table (gems, key halves and bulk supplies); luck items improve those odds.
Best for
Only from this monster
No other monster drops these.
- Damaged dinosaur bonesAlways
- Occultist's ring2/399
- Jail cell key1/399
- Osseous' skull1/500
- Calcified heart1/2,000
Best drop rate anywhere
Of every monster that drops these, this one gives the most per kill.
- Ancient scale50/10,000
- Heart of the Berserker1/225
- Savage plume1/450
- Savage spear cap1/450
- Savage spear shaft1/450
- Savage spear tip1/450
- Skeka's hypnowand focus7/5,000
- Skeka's hypnowand base1/5,000
- Skeka's hypnowand projector1/5,000
Drops (30)
| Item | Quantity | Rarity |
|---|---|---|
| Coins | 75000–125000 | 1,000/10,000 |
| Damaged dinosaur bonesOnly source | 4–6 | Always |
| Watermelon seedBest rate | 20–30 | 1,000/10,000 |
| Dinosaur bones#2 rate | 2 | Always |
| Onyx bolt tips | 17–23 | 1,000/10,000 |
| Uncut dragonstone | 8–12 (noted) | 1,000/10,000 |
| Medium blunt rune salvage#2 rate | 4–8 (noted) | 1,035/10,000 |
| Large spiky rune salvageBest rate | 4–6 (noted) | 1,035/10,000 |
| Super necromancy (3)Best rateEasiest | 5 (noted) | 1,000/10,000 |
| White berries | 5 (noted) | 1,000/10,000 |
| Arbuck seedBest rate | 2 | 1,130/10,000 |
| Sealed clue scroll (hard) | 1 | 10/1,280 |
| Occultist's ringOnly source | 1 | 2/399 |
| Ancient scaleBest rate | 1 | 50/10,000 |
| Draconic energy#3 rate | 1 | 50/10,000 |
| Sirenic scale | 1 | 50/10,000 |
| Heart of the BerserkerBest rateEasiest | 1 | 1/225 |
| Sealed clue scroll (elite) | 1 | 495/128,000 |
| Jail cell keyOnly source | 1 | 1/399 |
| Savage plumeBest rateEasiest | 1 | 1/450 |
| Savage spear capBest rateEasiest | 1 | 1/450 |
| Savage spear shaftBest rateEasiest | 1 | 1/450 |
| Savage spear tipBest rateEasiest | 1 | 1/450 |
| Osseous' skullOnly source | 1 | 1/500 |
| Skeka's hypnowand focusBest rate | 1 | 7/5,000 |
| Calcified heartOnly source | 1 | 1/2,000 |
| Skeka's hypnowand baseBest rate | 1 | 1/5,000 |
| Skeka's hypnowand handle | 1 | 1/5,000 |
| Skeka's hypnowand projectorBest rate | 1 | 1/5,000 |
| Sealed clue scroll (master) | 1 | 5/128,000 |
Most common first. “Best rate” and “#2/#3 rate” compare expected drops per kill with every other monster that drops the item. Rare drop table items are not repeated here.