Chambers of Xeric (CoX) Complete Guide

By Expos.GG Team · 2026-01-29

Master Chambers of Xeric with our complete guide. From Tekton to Olm, learn every room and maximize your chance at purples.

Overview

Chambers of Xeric (CoX) is OSRS's first raid, offering some of the best drops in the game including Twisted Bow, Ancestral robes, and Dragon Claws.

Requirements

Minimum - 90+ Combat stats - 78 Herblore (overloads) - 30 Construction (storage)

Recommended - 99 Combat stats - 90+ Herblore - Rigour and Augury

Getting There

- Xerics Talisman (Xeric's Glade) - Mount Karuulm teleport

Raid Rooms

Combat Rooms

Tekton - Melee-only boss - 4:1 or 4:0 methods - Dragon Warhammer specs important

Vanguards - Three bosses, balance damage - Range Mage Melee - Keep HP within 33%

Vespula - Protect portal from wasps - Kill lux grubs for energy - Avoid red pools

Vasa Nistirio - Attack crystals first - Avoid teleport attack - DPS race

Muttadiles - Small then large - Bring BGS/DWH specs - Freeze and attack

Guardians - Pickaxe the guardian - Avoid falling rocks - Medium difficulty

Shamans - Like lizardman shamans - Avoid spawns - Standard mechanics

Skilling Rooms

Farming - Get seeds from chests - Grow buchu, golpar, noxifer - Essential for potions

Fishing - Catch fish for food - Pyromancer room cooking - More fish = more food

The Great Olm

Phase 1 & 2 - Left hand: Attacks - Right hand: Healing - Kill hands before head

Phase 3 - Hands respawn once - Crystal bomb phase - Lightning follows player - Flame walls to dodge

Head Phase - All DPS on head - Avoid specials - Kill for loot

Gear Setup

Melee Switch - Avernic/Dragon defender - Bandos/Torva - Torture amulet - Dragon claws for specs

Range - Twisted bow (BiS) - Crystal armor + Bowfa - Armadyl if no Tbow

Mage Switch - Ancestral - Sang staff or Trident

Potions to Make

- Overloads (Herblore room) - Brews (from fishing) - Restores (skilling)

Point System

Points = Damage dealt / Resources used - Higher points = Better loot chance - Personal points matter - Cap at 131,071 points

Unique Drops

| Item | Drop Rate | |------|-----------| | Twisted Bow | 1/34.5 (scaled) | | Ancestral | 1/17.25 each | | Dragon Claws | 1/23 | | Elder Maul | 1/34.5 | | Kodai Wand | 1/34.5 |

Tips

1. Learn with teams first - Easier to learn 2. Scouts save time - Find good layouts 3. DWH specs matter - Always spec Tekton 4. 4:1 Olm - Essential technique

Need Raid Clears?

Get CoX completions and chase that Tbow.