# Chambers of Xeric

"Chambers" redirects here. For other uses, see Chamber.

The Chambers of Xeric is a large cave system underneath Mount Quidamortem, built by Xeric in the Kebos Lowlands. Released on 5 January 2017, it is the first raid released in Old School RuneScape.

## Location

Getting to Mount Quidamortem from the Shayziens' Wall.

The Chambers of Xeric are located on Mount Quidamortem, which can be quickly accessed via the Lovakengj Minecart Network. This will require the player to bring a minecart control scroll from Miriam and bring it to Stuliette on the mountain. Doing so requires the player to have earned 65% Lovakengj favour.

Otherwise, players will need to head to the Shayziens' Wall and make their way west to Mount Quidamortem; be wary of aggressive lizardmen and lizardmen brutes. For those arriving there without the mine cart system, speak to the Mountain Guide (who is located on the mountain next to Gnosi, Historian Duffy, and the Natural Historian) before leaving; doing so will establish a two-way transportation system between the mountain and the Shayziens' Wall.

Once players receive an ancient tablet as a reward from the Chambers of Xeric, they are able to use it on Xeric's talisman to instantly teleport to the mountain.

## Mechanics

The Chambers of Xeric uses a unique party finding system to help determine how strong the team is. This will affect the strength of the monsters and bosses, in addition to the requirements needed in the skilling rooms. Players can bring their own supplies in (tools not needed), but will need to utilise the chambers' resources in order to defeat the increasingly strong bosses. Any number of players from 1 to 100 may start a raid.

To start a raid, the leader must create a team. This "team" is the leader's Clan Chat; which other players may join by manually typing in the clan chat's name or by requesting to join the chat. Once everyone is ready, the leader should enter the chambers, where a starting room is located. The raid officially starts once the leader confirms that everyone is in the room; when that happens, all the mechanics will be calculated and no one may join the instance if they were not in by the time the raid started. If the leader leaves by any means, the next leader will be whoever has the ability to kick players from the Clan Chat; if no suitable rank is found, everyone is thrown out of the instance.

There are multiple demi-bosses/resource/puzzle rooms, and a final boss in every raid. There are three floors in each raid; the final floor is always the same, housing the final boss. At the end of the first and second floors is an energy well that fully replenishes the players' energy when interacted with.

Communication and teamwork is needed for players to defeat the bosses and complete the raid.

### Challenge Mode

Challenge Mode is a "hard" version of the existing Chambers of Xeric. All combat and puzzle rooms are featured, and the enemies themselves have significantly increased stats. The layout is always linear, and has four floors due to all combat/puzzle rooms being featured.

Completion of the mode can yield metamorphic dust to reskin an olmlet, and a cosmetic cape.

## Bosses

A group of players fighting the Great Olm.

## Rewards

Player rewards are based on "participation" points. As the team collects more points, they have an increased chance of obtaining unique items. Individually, these points determine what common rewards are given and the quantity of these rewards. If a player dies in a raid, they will lose 40% of the points that they had before their death. If the player dies with no or extremely few personal points, the team's overall points are reduced instead.

For example, if a player has 25,000 points and received ranarr weed drop and uncut rubies, they would get ${\displaystyle 25,000*8}$ coins worth of ranarr weed and uncut ruby, which works out to be 30 ranarr weeds and 88 uncut rubies. This has not been proven, but has been inferred by looking at the value of drops and the points received.

The current maximum amount of points attainable per player is 131,071 points.

If a member of a raid party leaves early, the points multiplier and difficulty for that raid will remain the same.

## Loot table

If the team does not roll into the unique drop table, players will obtain two random common rewards instead. The third slot is reserved for the dark journal if players do not have it already, and the metamorphic dust for players completing a challenge mode raid.

### Unique drop table

Upon the Great Olm's death, if a unique reward item is given, it will be announced in the game chat. The beam of light covering the chest will change from white to purple for the player(s) who obtained a unique reward.

For every 8,675 total points obtained, a 1% chance to obtain a unique loot is given. This chance is capped at 65.7% (570,000 points) - any further points will be sent to roll for a second unique loot. For example, a team who possesses 855,000 points in total has an 65.7% chance to receive a unique loot, and then a 32.85% chance to obtain a second unique loot.[1] Up to three unique rewards can be obtained per raid, assuming that there are enough points to roll for them.

If no unique loot is obtained, random resources are chosen, with the player's points determining the quantity of the items they obtain. In groups of all sizes, a weighting system is added when a unique loot is rolled, based on the players' points. For example, a player who has 90,000 points is twice as likely to obtain a unique reward compared to a player with 45,000 points.

Once the game has chosen which player will receive the unique loot, an item is chosen from the table below. The higher the weighting, the more likely a player will receive that item.

Accessing this table is required in order to be eligible for Olmlet.

Item Weighting (% chance)[2] GE Price
Dexterous prayer scroll 20 (28.99%) 52,950,281
Arcane prayer scroll 4,548,354
Twisted buckler 4 (5.80%) 5,862,100
Dragon hunter crossbow 110,576,333
Dinh's bulwark 3 (4.35%) 6,511,848
Ancestral hat 13,874,095
Ancestral robe top 57,479,918
Ancestral robe bottom 59,625,180
Dragon claws 63,795,593
Elder maul 2 (2.90%) 14,046,578
Kodai insignia 71,768,975
Twisted bow 1,006,594,167

The chance of obtaining a unique loot can be calculated by performing the following steps:

1. Calculate the chance of receiving a unique loot (number of points/8,675)
2. Convert the result by (dividing result by 100)
3. Calculate the chance of receiving a specific unique loot by dividing the weight of the item by the sum of the total weights (Item weight/69)
4. Multiply the first result with the second result.

For example, we will calculate the drop rate of a pair of dragon claws if the team has 413,250 total points:

1. Chance of receiving a unique loot: 413,250/8,675 ≈ 47.6%, or 0.476
2. Chance of receiving dragon claws from table: 3/69 (or 1/23)
3. 0.476*(3/69) = 0.020714, which equals a 2.0714% chance of receiving dragon claws.

### Runes and ammunition

Item Quantity Rarity Price High Alch
Death rune1–3,100Uncommon216-669,600108-334,800
Blood rune1–4,095Uncommon364-1,490,580240-982,800
Soul rune1–6,554[r 1]Uncommon145-950,330180-1,179,720
Rune arrow1–9,437Uncommon81-764,397240-2,264,880
Dragon arrow1–926Uncommon783-725,058480-444,480
1. The number of Soul rune is determined by dividing your rounded point total by 20.

### Herbs

Item Quantity Rarity Price High Alch
Grimy ranarr weed1–164 (noted)[r 1]Uncommon7,185-1,178,34018-2,952
Grimy irit leaf1–668 (noted)Uncommon761-508,34810-6,680
Grimy avantoe1–354 (noted)Uncommon1,494-528,87610-3,540
Grimy kwuarm1–323 (noted)Uncommon1,321-426,68312-3,876
Grimy snapdragon1–131 (noted)Uncommon7,885-1,032,93512-1,572
Grimy dwarf weed1–616 (noted)Uncommon524-322,78414-8,624
Grimy torstol1–153 (noted)Uncommon7,387-1,130,21115-2,295
1. The number of ranarr weed is determined by dividing your rounded point total by 800.

### Ores and gems

Item Quantity Rarity Price High Alch
Silver ore1–6,553 (noted)[r 1]Uncommon73-478,36945-294,885
Coal1–6,553 (noted)[r 2]Uncommon133-871,54927-176,931
Gold ore1–2,892 (noted)[r 3]Uncommon369-1,067,14890-260,280
Mithril ore1–2,892 (noted)[r 4]Uncommon174-503,20897-280,524
Runite ore1–87 (noted)Uncommon11,442-995,4541,920-167,040
Uncut sapphire1–642 (noted)Uncommon628-403,17615-9,630
Uncut emerald1–923 (noted)Uncommon770-710,71030-27,690
Uncut ruby1–524 (noted)[r 5]Uncommon1,362-713,68860-31,440
Uncut diamond1–253 (noted)Uncommon2,781-703,593120-30,360
1. The number of silver ores is determined by dividing your rounded point total by 20.
2. The number of coal is determined by dividing your rounded point total by 20.
3. The number of gold ores is determined by dividing your rounded point total by 44.
4. The number of mithril ores is determined by dividing your rounded point total by 32.
5. The number of uncut rubies is determined by dividing your rounded point total by 250.

### Other

Item Quantity Rarity Price High Alch
Ancient tablet11/10[r 1]Not sold45,000
Clue scroll (elite)11/12[r 2]Not sold12
Lizardman fang1–4,898Uncommon15-73,47036-176,328
Pure essence1–65,535 (noted)[r 3]Uncommon2-131,0702-131,070
Saltpetre1–5,461 (noted)[r 4]Uncommon4-21,8443-16,383
Teak plank1–1,310 (noted)[r 5]Uncommon865-1,133,150300-393,000
Mahogany plank1–550 (noted)Uncommon1,976-1,086,800900-495,000
Dynamite1–2,390 (noted)Uncommon778-1,859,42060-143,400
Torn prayer scroll1Uncommon46,86248,000
Dark relic1UncommonNot sold0
1. Only received if players do not own one or have not consumed it already.
2. If a player rolls the resource table, there is a 1/12 chance of getting an elite clue as an additional reward.
3. The number of pure essence is determined by dividing your rounded point total by 2.
4. The number of saltpetre is determined by dividing your rounded point total by 24.
5. The number of teak planks is determined by dividing your rounded point total by 100.

### Tertiary

Item Quantity Rarity Price High Alch
Dark journal1Always[r 1]Not sold0
Olmlet11/53[r 2]Not soldN/A
Metamorphic dust11/400[r 3]Not sold0
1. Only received if players do not have it stored in their bank.
2. Only rolled when the player gets a broadcasted unique reward; with 26,025 points per raid, the Olmlet rate is ~1/1,765.
3. Only obtainable in Challenge Mode and if the raid was completed within a certain time.

## Music unlocked

Name Unlock details Music track
Upper Depths Unlocked upon entering the Chambers of Xeric
Lower Depths Unlocked in the second sub-level of the Chambers of Xeric
Fire in the Deep Unlocked during the battle with the Great Olm

## Changes

Date Changes
14 March 2019
(update)
Enchant spells are no longer offered in the Chambers of Xeric, as the stat-boosts in there are unusually large and were not intended for getting oneself permanent access to items unrelated to the Chambers.
7 March 2019
(update)
NPC stats are now scaled based on the player with the highest combat stats rather than the average combat stats of all party members
28 February 2019
(update)
• Trees found within the ice demon room in Chambers of Xeric are now less likely to fall
• Players will now receive more wood than before when successfully chopping trees within the room based on Woodcutting level
• As saplings can now give more wood than before, the Woodcutting XP gained per item of kindling has been reduced slightly
• The ice demon's defences are now lower than before and its magic defence is now calculated from its defence level rather than magic, making it weaker to spells overall, including its additional weakness to fire spells
• In Challenge Mode, the 5k bonus points are now added to the team's reward rather than individual party members
• A bit of wall sticking out of one of the Skeletal Mystic's rooms in the Chambers of Xeric has been removed
• Tweaks to the Vanguard’s reset mechanic have been made to ensure they are reset correctly
14 February 2019
(update)
• Great Olm's flame attack can now be doused with Humidify and vessels of water.
• Elite clue scrolls are now an additional reward instead of replacing the second reward.
• Monster Examine may now be cast on all monsters in the raid.
10 January 2019
(update | poll)
Dragon sword, dragon harpoon and dragon thrownaxe were removed from the drop table and moved to monsters in Karuulm Slayer Dungeon. This did not affect the rarity of other drops, as they were re-weighted.
17 May 2018
(update | poll)
Challenge Mode was implemented, providing a more difficult raid with every room in a static layout.
8 February 2018
(update | poll)
• A bronze axe spawn was added in the ice demon room. Previously, a tinderbox was also added.
• Whenever a mini-boss is killed, a broadcast will go out to player as to who obtained its drops.
• The party interface now shows how many times the player has successfully completed the Chambers of Xeric.
• The three storage chests were modified to now require 2, 4 and 6 mallignum root planks respectively, down from 4, 8 and 15.

## Trivia

A concept art of the Paradigm of Exodus, a raid whose concept was later reshaped into the Chambers of Xeric.
• The Chambers of Xeric was originally proposed in 2014 as the "Paradigm of Exodus", a large dungeon found in and around an active volcano, allowing 5 to 30 players to take on powerful monsters and solving puzzles in a randomly generated layout, with a boss at the end of the raid.

## References

1. Jagex. Mod Ash's Twitter account. 15 January 2019. Mod Ash: "Previously, every 570k points got the party a 80% chance of a unique. Now, every 570k points gets the party a 65.7% chance of a unique. Pets changed from 1/65 to 1/53 for a player who got a unique."
2. Jagex. Mod Kieren's Twitter account. 12 May 2017. (Archived from the original on 25 Mar 2019.) Mod Kieren: "As requested by lots of people endlessly: Raids drop rates! [1]"