Chambers of Xeric

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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[edit | edit source]

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[edit | edit source]

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[edit | edit source]

Chambers of Xeric Challenge Mode icon.png

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[edit | edit source]

A group of players fighting the Great Olm.

Rewards[edit | edit source]

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 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.

As of an update on 23 March 2017, if a member of a raid party leaves early, the points multiplier for that raid will be reduced based on the number of people remaining in the party. However, the difficulty of the bosses will remain the same. In addition, the amount of raids points lost for the team when a player with low points dies has been increased.

Loot table[edit | edit source]

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[edit | edit source]

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) GE Price
Dexterous prayer scroll.png Dexterous prayer scroll 20 (28.99%) 59,295,392
Arcane prayer scroll.png Arcane prayer scroll 4,221,597
Twisted buckler.png Twisted buckler 4 (5.80%) 8,124,913
Dragon hunter crossbow.png Dragon hunter crossbow 129,213,033
Dinh's bulwark.png Dinh's bulwark 3 (4.35%) 5,609,451
Ancestral hat.png Ancestral hat 15,139,358
Ancestral robe top.png Ancestral robe top 73,191,370
Ancestral robe bottom.png Ancestral robe bottom 65,632,401
Dragon claws.png Dragon claws 63,227,071
Elder maul.png Elder maul 2 (2.90%) 16,718,045
Kodai insignia.png Kodai insignia 72,216,735
Twisted bow.png Twisted bow 1,189,185,438

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[edit | edit source]

Item Quantity Rarity GE market price
Death rune.png: Chambers of Xeric can drop the item Death rune with rarity Uncommon in quantity 1-3100 Death rune 1–3,100 Uncommon 223–691,300
Blood rune.png: Chambers of Xeric can drop the item Blood rune with rarity Uncommon in quantity 1-4095 Blood rune 1–4,095 Uncommon 289–1,183,455
Soul rune.png: Chambers of Xeric can drop the item Soul rune with rarity Uncommon in quantity 1-6554 Soul rune 1–6,554 [2] Uncommon 147–963,438
Rune arrow.png: Chambers of Xeric can drop the item Rune arrow with rarity Uncommon in quantity 1-9437 Rune arrow 1–9,437 Uncommon 95–896,515
Dragon arrow.png: Chambers of Xeric can drop the item Dragon arrow with rarity Uncommon in quantity 1-926 Dragon arrow 1–926 Uncommon 871–806,546

Herbs[edit | edit source]

Item Quantity Rarity GE market price
Grimy toadflax.png: Chambers of Xeric can drop the item Grimy toadflax with rarity Uncommon in quantity 1-354 (noted) Grimy toadflax 1–354 (noted) Uncommon 1,269–449,226
Grimy ranarr weed.png: Chambers of Xeric can drop the item Grimy ranarr weed with rarity Uncommon in quantity 1-164 (noted) Grimy ranarr weed 1–164 (noted) [3] Uncommon 6,833–1,120,612
Grimy irit leaf.png: Chambers of Xeric can drop the item Grimy irit leaf with rarity Uncommon in quantity 1-668 (noted) Grimy irit leaf 1–668 (noted) Uncommon 842–562,456
Grimy avantoe.png: Chambers of Xeric can drop the item Grimy avantoe with rarity Uncommon in quantity 1-354 (noted) Grimy avantoe 1–354 (noted) Uncommon 1,567–554,718
Grimy kwuarm.png: Chambers of Xeric can drop the item Grimy kwuarm with rarity Uncommon in quantity 1-323 (noted) Grimy kwuarm 1–323 (noted) Uncommon 1,092–352,716
Grimy snapdragon.png: Chambers of Xeric can drop the item Grimy snapdragon with rarity Uncommon in quantity 1-131 (noted) Grimy snapdragon 1–131 (noted) Uncommon 8,160–1,068,960
Grimy cadantine.png: Chambers of Xeric can drop the item Grimy cadantine with rarity Uncommon in quantity 1-319 (noted) Grimy cadantine 1–319 (noted) Uncommon 1,304–415,976
Grimy lantadyme.png: Chambers of Xeric can drop the item Grimy lantadyme with rarity Uncommon in quantity 1-446 (noted) Grimy lantadyme 1–446 (noted) Uncommon 1,227–547,242
Grimy dwarf weed.png: Chambers of Xeric can drop the item Grimy dwarf weed with rarity Uncommon in quantity 1-616 (noted) Grimy dwarf weed 1–616 (noted) Uncommon 620–381,920
Grimy torstol.png: Chambers of Xeric can drop the item Grimy torstol with rarity Uncommon in quantity 1-153 (noted) Grimy torstol 1–153 (noted) Uncommon 7,170–1,097,010

Ores and gems[edit | edit source]

Item Quantity Rarity GE market price
Silver ore.png: Chambers of Xeric can drop the item Silver ore with rarity Uncommon in quantity 1-6553 (noted) Silver ore 1–6,553 (noted) [4] Uncommon 75–491,475
Coal.png: Chambers of Xeric can drop the item Coal with rarity Uncommon in quantity 1-6553(noted) Coal 1–6,553 (noted) [5] Uncommon 156–1,022,268
Gold ore.png: Chambers of Xeric can drop the item Gold ore with rarity Uncommon in quantity 1-2892 (noted) Gold ore 1–2,892 (noted) Uncommon 356–1,029,552
Mithril ore.png: Chambers of Xeric can drop the item Mithril ore with rarity Uncommon in quantity 1-2892 (noted) Mithril ore 1–2,892 (noted) [6] Uncommon 176–508,992
Adamantite ore.png: Chambers of Xeric can drop the item Adamantite ore with rarity Uncommon in quantity 1-729 (noted) Adamantite ore 1–729 (noted) Uncommon 1,329–968,841
Runite ore.png: Chambers of Xeric can drop the item Runite ore with rarity Uncommon in quantity 1-87 (noted) Runite ore 1–87 (noted) Uncommon 11,358–988,146
Uncut sapphire.png: Chambers of Xeric can drop the item Uncut sapphire with rarity Uncommon in quantity 1-642 (noted) Uncut sapphire 1–642 (noted) Uncommon 637–408,954
Uncut emerald.png: Chambers of Xeric can drop the item Uncut emerald with rarity Uncommon in quantity 1-923 (noted) Uncut emerald 1–923 (noted) Uncommon 788–727,324
Uncut ruby.png: Chambers of Xeric can drop the item Uncut ruby with rarity Uncommon in quantity 1-524 (noted) Uncut ruby 1–524 (noted) [7] Uncommon 1,406–736,744
Uncut diamond.png: Chambers of Xeric can drop the item Uncut diamond with rarity Uncommon in quantity 1-253 (noted) Uncut diamond 1–253 (noted) Uncommon 2,885–729,905

Other[edit | edit source]

Item Quantity Rarity GE market price
Dark journal.png: Chambers of Xeric can drop the item Dark journal with rarity Always in quantity 1 Dark journal 1 Always [8] Not sold
Ancient tablet.png: Chambers of Xeric can drop the item Ancient tablet with rarity Common in quantity 1 Ancient tablet 1 Common (1/10)[9] Not sold
Clue scroll (elite).png: Chambers of Xeric can drop the item Clue scroll (elite) with rarity Common in quantity 1 Clue scroll (elite) 1 Common (~1/12)[10] Not sold
Lizardman fang.png: Chambers of Xeric can drop the item Lizardman fang with rarity Uncommon in quantity 1-4898 Lizardman fang 1–4,898 Uncommon 11–53,878
Pure essence.png: Chambers of Xeric can drop the item Pure essence with rarity Uncommon in quantity 1-65535 (noted) Pure essence 1–65,535 (noted) [11] Uncommon 3–196,605
Saltpetre.png: Chambers of Xeric can drop the item Saltpetre with rarity Uncommon in quantity 1-5461 (noted) Saltpetre 1–5,461 (noted) [12] Uncommon 5–27,305
Teak plank.png: Chambers of Xeric can drop the item Teak plank with rarity Uncommon in quantity 1-1310 (noted) Teak plank 1–1,310 (noted) [13] Uncommon 872–1,142,320
Mahogany plank.png: Chambers of Xeric can drop the item Mahogany plank with rarity Uncommon in quantity 1-550 (noted) Mahogany plank 1–550 (noted) Uncommon 2,020–1,111,000
Dynamite.png: Chambers of Xeric can drop the item Dynamite with rarity Uncommon in quantity 1-2390 (noted) Dynamite 1–2,390 (noted) Uncommon 488–1,166,320
Torn prayer scroll.png: Chambers of Xeric can drop the item Torn prayer scroll with rarity Uncommon in quantity 1 Torn prayer scroll 1 Uncommon 46,465
Dark relic.png: Chambers of Xeric can drop the item Dark relic with rarity Uncommon in quantity 1 Dark relic 1 Uncommon Not sold
Metamorphic dust.png: Chambers of Xeric can drop the item Metamorphic dust with rarity Rare in quantity 1 Metamorphic dust 1 Rare (1/400)[14] Not sold
Olmlet.png: Chambers of Xeric can drop the item Olmlet with rarity Very rare in quantity 1 Olmlet 1 Very rare (1/53)[15] Not sold
  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. The number of Soul rune is determined by dividing your rounded point total by 20
  3. The number of ranarr weed is determined by dividing your rounded point total by 800
  4. The number of silver ores is determined by dividing your rounded point total by 20
  5. The number of coal is determined by dividing your rounded point total by 20
  6. The number of mithril ores is determined by dividing your rounded point total by 32
  7. The number of uncut rubies is determined by dividing your rounded point total by 250
  8. Tertiary drop. Only received if players do not have it stored in their bank.
  9. Only received if players do not own one or have not consumed it already.
  10. If a player rolls the resource table, there is a 1/12 chance of getting an elite clue as an additional reward.
  11. The number of pure essence is determined by dividing your rounded point total by 2
  12. The number of saltpetre is determined by dividing your rounded point total by 24
  13. The number of teak planks is determined by dividing your rounded point total by 100
  14. Tertiary drop. Only obtainable in Challenge Mode and if the raid was completed within a certain time.
  15. 1/53 chance to roll when the player gets a broadcasted unique reward; with 26,025 points per raid, the Olmlet rate is ~1/1,765.

Concept art[edit | edit source]

Changes[edit | edit source]

Date Changes
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.
17 May 2018 (update | poll) Challenge Mode was implemented, providing a more difficult raid with every room in a static layout.
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.
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.
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
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
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.

Trivia[edit | edit source]

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[edit | edit source]