Zulrah
Late game · Ranged, Magic · solo · recommended 90+ combat
Why Ironmen kill it
The toxic blowpipe, the serpentine helm, the magic fang and onyx chances. The classic Ironman boss.
Requirements to access
Skills
None
Quests
Hardcore Ironman
A death here ends Hardcore status (safe once you have the Western Provinces Elite diary's resurrection).
Drops worth chasing
| Drop | What it's for | Rate | 90% chance by |
|---|---|---|---|
| Serpentine visageGear | Makes Serpentine helm Venom immunity, which makes several bosses much easier. | 1/512 per kill | 1,179 kills |
| Uncut onyxGear | Makes Amulet of fury Big all-round upgrade over glory. | 1/512 per kill | 1,179 kills |
| Tanzanite fangGear | Makes Toxic blowpipe Very fast ranged weapon that heals you on special attack. | 1/512 per kill | 1,179 kills |
| Magic fangGear | Makes Trident of the swamp Stronger trident that can venom. | 1/512 per kill | 1,179 kills |
| Zulrah's scalesResource | Charges the blowpipe, trident and serpentine helm. | Every kill | — |
| Pet snakelingPet | The boss pet. | 1/4,000 per kill | 9,210 kills |
“90% chance by” is how many kills (or chests) give a 90% chance of having the drop; most players get it sooner, and some much later. Raid rates are a share of unique drops, which depend on points and team size. See every upgrade in order on the Ironman gear progression page.
Top kill counts
Are you ready?
Look yourself up; the planner lists which bosses your stats and quests unlock.
Other late game bosses
Requirements and drop rates (rates fetched 2026-10-01) checked against the Old School RuneScape Wiki (CC BY-NC-SA 3.0). Requirements are game facts; the descriptions here are our own.