Dagannoth Rex | OSRS Index

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Dagannoth Rex



Released		7 November 2005 (Update)
Members		Yes
Combat level		303
Size		3x3
Examine		Firstborn of the legendary dagannoth kings.

Combat info

XP bonus		+30%
Max hit		26
Aggressive		Yes
Poisonous		No
Attack style		Slash
Attack speed		4 ticks (2.4 seconds)
Respawn time		150 ticks (90 seconds)

Slayer info

Slayer level		None
Slayer XP		331.4 xp
Category		Bosses, Dagannoth
Assigned by

Combat stats


255	255	255	255	0	255

Aggressive stats


+0	+0	+0	+0	+0	+0

Melee defence


+255		+255		+255

Magic defence


+10			35% weakness

Ranged defence


+255		+255		+255

Immunities

Poison		0% resistance
Venom		Converts to poison
Cannons		Not immune
Thralls		Not immune

Open in DPS calculator
Advanced data

Monster ID		2267
Link		MOID

Dagannoth Rex is the Melee-based Dagannoth King found in the depths of the Waterbirth Island Dungeon, along with fellow Dagannoth Kings, Dagannoth Supreme and Dagannoth Prime. Rex is the only monster to drop the Berserker and Warrior rings. He, along with the other Dagannoth Kings, can also drop the rare dragon axe.

Location

Location	Levels	Members	Spawns	Map	League region
Waterbirth Island Dungeon	303		1	Show map	Fremennik✓
Waterbirth Island Dungeon (Slayer lair)	303		1	Show map	Fremennik✓

Dagannoth Rex spawns and roams on the south-eastern side of the Dagannoth Kings' lair. The lair is accessible via the Kings' ladder deep within the Waterbirth Island Dungeon. A separate lair where players that have a Dagannoth Slayer task can attack the Kings is accessible by using the "Slayer" option on the ladder. The lair can be peeked at to see if other players are inside it via the ladder and a crack inside a safe room nearby the ladder.

Strategy

Luring Rex to a safespot.

Dagannoth Rex has an extremely low Magic Defence, so it is recommended to use Magic against him. Popular choices include Magic Dart, Iban Blast, powered staves, and Earth spells.

Due to his large size and the fact he uses melee attacks only, it is recommended to get him stuck on one of the ridges of the lair and safespot him (note that Spinolyps will still be constantly attacking while you're safespotting). Many players use high-level armour such as Barrows armour, which give high Defence bonuses while still being able to hit Rex constantly with spells due to his very low Magic Defence, even if their magic attack bonus is below zero. Players who use Guthan's are advised to heal themselves on the Spinolyps while waiting on respawns to help preserve food and potions.

If players venture too far out west to lure Dagannoth Rex, they risk attracting attention from both Dagannoth Prime and Dagannoth Supreme. Prime is the bigger threat since he wanders closer to the east and north-east. This can be avoided by staying in the south-eastern part of the arena, as Prime will rarely (if ever) go there, and attack Rex only when he's nearest to the east. Players should use caution even while in the safe area. Others may attempt to kill you with Dagannoth Prime's AOE attack.

Money making

The following money making guide is available for Dagannoth Rex:

Method	Hourly profit	Skills
Killing Dagannoth Kings (Rex only)	987,977	50+ for Iban blast or 78+ for the Trident of the swamp 40+ recommended for wearing decent tank gear 43+ recommended for Protect from Melee 85+ recommended for the agility shortcut

Drops

Drop rates are estimated based on 217,761 samples from the Drop Rate Project, unless otherwise cited.

The average Dagannoth Rex kill is worth 42,212.25.

The average high alch value of a Dagannoth Rex kill is 2,299.99.

The average Dagannoth Rex kill while on a Konar task is worth 43,639.83.

Excluding berserker ring drops, the average kill is worth 15,670.00.

100%

	Item	Quantity	Rarity	Price	High Alch
	Dagannoth bones	1^{[d 1]}	Always	11,585	90
	Dagannoth hide	1	Always	210	36

^ Dropped in noted form if the player has completed the elite tier of the Fremennik diary

Weapons and armour

Item	Quantity	Rarity	Price	High Alch
Steel kiteshield	1	17/128	264	510
Mithril warhammer	1	11/128	820	996
Adamant axe	1	7/128^[1]	465	768
Steel platebody	1	4/128	927	1,200
Mithril pickaxe	1	3/128	468	780
Adamant platebody	1	2/128	9,440	9,984
Fremennik blade	1	2/128	Not sold	3,000
Dragon axe	1	1/128^[2]^[3]	67,574	33,000
Rune axe	1	1/128	7,373	7,680
Fremennik shield	1	1/128	Not sold	3,000
Fremennik helm	1	1/128	Not sold	3,000
Mithril 2h sword	1	1/128	1,245	1,560
Ring of life	1	1/128	1,757	2,115
Rock-shell plate	1	1/128^[4]	38,173	39,000
Rock-shell legs	1	1/128^[4]	37,603	38,400
Berserker ring	1	1/128^[2]^[3]^[4]	3,397,281	6,000
Warrior ring	1	1/128^[2]^[3]^[4]	51,920	6,000

Potions

Item	Quantity	Rarity	Price	High Alch
Antifire potion(2)	1	1/128	562	118
Prayer potion(2)	1	1/128	4,519	68
Restore potion(2)	1	1/128	48	39
Super attack(2)	1	1/128	960	81
Super strength(2)	1	1/128	1,552	99
Super defence(2)	1	1/128	1,849	118
Zamorak brew(2)	1	1/128	543	90

Ores and bars

Item	Quantity	Rarity	Price	High Alch
Mithril ore	25 (noted)	10/128	3,775	2,425
Adamantite bar	1	3/128	1,851	384
Coal	100 (noted)	2/128	14,600	2,700
Iron ore	150 (noted)	1/128	11,400	1,500
Steel bar	15–30 (noted)	1/128	8,385–16,770	900–1,800

Talismans

There is a 1/128 chance of rolling the talisman drop table.^[5]

Item	Quantity	Rarity	Price	High Alch
Air talisman	1	1/896	201	2
Body talisman	1	1/896	1,690	2
Earth talisman	1	1/896	558	2
Fire talisman	1	1/896	4,550	2
Mind talisman	1	1/896	1,255	2
Water talisman	1	1/896	275	2
Cosmic talisman	1	1/2,240	187	2
Chaos talisman	1	1/2,986.7	236	2
Nature talisman	1	1/2,986.7	268	2

Other

Item	Quantity	Rarity	Price	High Alch
Coins	100–1,209	10/128	100–1,209	100–1,209
Grimy ranarr weed	1	7/128	5,262	18
Bass	5	7/128	235	120
Swordfish	5	4/128	1,005	240
Shark	5	1/128	5,265	510

Rare and Gem drop table

There is a 8/128 chance of rolling the rare drop table. There is also a 10/128 chance of rolling the gem drop table.

Item	Quantity	Rarity	Price	High Alch
Nothing	N/A	1/19.87; Never^{[d 1]}	N/A	N/A
Coins	3,000	1/97.52	3,000	3,000
Uncut sapphire	1	1/45.51; 1/23.11^{[d 2]}	228	15
Loop half of key	1	1/95.67; 1/89.95^{[d 2]}	9,756	60
Tooth half of key	1	1/95.67; 1/89.95^{[d 2]}	9,887	60
Uncut emerald	1	1/91.02; 1/46.22^{[d 2]}	473	30
Uncut ruby	1	1/182.04; 1/92.44^{[d 2]}	1,087	60
Runite bar	1	1/409.6	12,265	3,000
Nature rune	67	1/682.67	11,457	7,236
Rune 2h sword	1	1/682.67	38,123	38,400
Rune battleaxe	1	1/682.67	24,639	24,960
Law rune	45	1/1,024	5,535	6,480
Death rune	45	1/1,024	8,325	4,860
Steel arrow	150	1/1,024	900	1,050
Rune arrow	42	1/1,024	1,974	10,080
Adamant javelin	20	1/1,024	800	1,920
Rune sq shield	1	1/1,024	22,747	23,040
Dragonstone	1	1/1,024	10,735	6,000
Silver ore	100 (noted)	1/1,024	6,200	4,500
Nature talisman	1	1/485.45; 1/246.52^{[d 2]}	268	2
Uncut diamond	1	1/728.18; 1/369.78^{[d 2]}	2,439	120
Rune kiteshield	1	1/2,048	32,110	32,640
Dragon med helm	1	1/2,048	58,090	60,000
Rune spear	1	1/1,997.29; 1/216.1^{[d 2]}^{[d 3]}	11,599	12,480
Rune javelin	5	1/1,456.36; 1/739.56^{[d 2]}	675	1,200
Shield left half	1	1/3,994.58; 1/432.21^{[d 2]}^{[d 3]}	65,355	66,000
Dragon spear	1	1/5,326.1; 1/576.28^{[d 2]}^{[d 3]}	38,438	37,440

^ The "nothing" drop is removed while wearing a ring of wealth.
^ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 The drop rate is increased while wearing a ring of wealth due to the "nothing" drop being removed.
^ ^3.0 ^3.1 ^3.2 Slightly reduced chance of dropping if Legends' Quest has not been completed.

Tertiary

Item	Quantity	Rarity	Price	High Alch
Dagannoth ribs	1	1/4^{[d 1]}	Not sold	0
Ensouled dagannoth head	1	1/20	1,323	273
Clue scroll (hard)	1	1/42^{[d 2]}^{[d 3]}^[3]	Not sold	12
Brimstone key	1	1/60^{[d 4]}	Not sold	N/A
Clue scroll (elite)	1	1/750^{[d 5]}^{[d 3]}^[2]^[3]	Not sold	12
Pet dagannoth rex	1	1/5,000^[6]	Not sold	N/A

^ Dagannoth ribs are only dropped during Rag and Bone Man II.
^ The hard clue scroll drop rate increases to 1/39 after unlocking the hard Combat Achievements rewards tier.
^ ^3.0 ^3.1 Clue scrolls will drop as scroll boxes after the completion of X Marks the Spot.
^ Brimstone keys are only dropped if killed on a Slayer task given by Konar quo Maten.
^ The elite clue scroll drop rate increases to 1/712 after unlocking the elite Combat Achievements rewards tier.

Combat Achievements

There are 5 Combat Achievement tasks (totalling 15 points) available for Dagannoth Rex.

Name	Description	Type	Tier	Comp%
A Frozen King	Kill Dagannoth Rex whilst he is immobilized.	Mechanical	Medium (2 pts)	16.8%
Dagannoth Rex Champion	Kill Dagannoth Rex 10 times.	Kill Count	Medium (2 pts)	39%
Dagannoth Rex Adept	Kill Dagannoth Rex 25 times.	Kill Count	Hard (3 pts)	35.4%
Death to the Warrior King	Kill Dagannoth Rex whilst under attack by Dagannoth Supreme and Dagannoth Prime.	Mechanical	Elite (4 pts)	11%
Toppling the Diarchy	Kill Dagannoth Rex and one other Dagannoth king at the exact same time.	Mechanical	Elite (4 pts)	5.3%

Changes

Date	Changes
27 August 2025 (Update)	Dagannoth Rex can now drop dagannoth ribs during Rag and Bone Man II.
25 June 2025 (Update)	Dagannoth Rex now has a 35% elemental weakness to earth spells.
5 March 2015 (Update \| poll)	Dagannoth bones are now noted drops if you have completed the Fremennik Elite Diary.
17 July 2014 (Update \| poll)	Players can now receive a pet version of this boss after defeating it.

References

^ Jagex. Mod Ash's Twitter account. 2 May 2017. Archived from the original on 15 April 2019. Mod Ash: "7/128 chance from Rex."
^ ^2.0 ^2.1 ^2.2 ^2.3 Envision. "Drop Rates V2." Old School RuneScape Forums.
^ ^3.0 ^3.1 ^3.2 ^3.3 ^3.4 Jagex. Mod Ash's Twitter account. 28 September 2015. Archived from the original on 15 April 2019. Mod Ash: "1/42 for a hard clue, 1/750 for elite, 1/128 for a d axe and 1/128 for a ring."
^ ^4.0 ^4.1 ^4.2 ^4.3 Jagex. Mod Ash's Twitter account. 10 July 2018. Archived from the original on 15 April 2019. Mod Ash: "Each of those items is 1/128."
^ Jagex. Mod Ash's Twitter account. 22 June 2016. Archived from the original on 15 April 2019. Mod Ash: "He has a 1/128 chance of calling the talisman table; it has a 1/7 chance of giving an air talisman."
^ Jagex. Mod JohnC's Twitter account. 22 September 2014. Archived from the original on 25 March 2019. Mod JohnC: "Almost forgot the final week of boss pet drop rates! DKS Pets are all 1 in 5000"

v t e Dagannoth
Dagannoth	Dagannoth egg Dagannoth spawn Dagannoth fledgeling Dagannoth Waterbirth POH Blue
Bosses	Dagannoth Kings Prime Rex Supreme Dagannoth mother
Pets	Dagannoth Prime Dagannoth Rex Dagannoth Supreme

Waterbirth Island

NPCs

Dagannoth Kings

	Prime Rex Supreme
Uniques	Archers ring Berserker ring Seers ring Warrior ring Mud battlestaff Seercull

Monsters

Items

Rock-shell armour	Helm Plate Legs Gloves Boots Rock-shell chunk Rock-shell shard Rock-shell splinter
Skeletal armour	Helm Top Bottoms Gloves Boots Fibula piece Ribcage piece Skull piece
Spined armour	Helm Body Chaps Gloves Boots Circular hide Flattened hide Stretched hide
Fremennik helmets	Archer helm Farseer helm Fremennik helm Warrior helm
Other	Dagannoth hide Fremennik blade Fremennik shield Snape grass

Bosses

World bosses

	The Hueycoatl Scurrius Giant Mole Deranged archaeologist Sarachnis Kalphite Queen Corporeal Beast Gemstone Crab
The Barrows Brothers	Ahrim the Blighted Karil the Tainted Dharok the Wretched Guthan the Infested Torag the Corrupted Verac the Defiled
The Dagannoth Kings	Dagannoth Prime Dagannoth Rex Dagannoth Supreme
God Wars Dungeon	Kree'arra Commander Zilyana General Graardor K'ril Tsutsaroth Nex
Moons of Peril	Eclipse Moon Blue Moon Blood Moon
The Wilderness bosses	Revenant maledictus Chaos Fanatic Crazy archaeologist Scorpia King Black Dragon Chaos Elemental Vet'ion (Calvar'ion) Venenatis (Spindel) Callisto (Artio)

Instanced bosses

	Amoxliatl Brutus (Demonic) Royal Titans (Branda the Fire Queen) (Eldric the Ice King) Zulrah Vorkath Phantom Muspah The Nightmare (Phosani's Nightmare) Yama Doom of Mokhaiotl Maggot King Mad Angel
Sporadic bosses	Obor Bryophyta The Mimic Hespori Skotizo
The Forgotten Four	The Leviathan The Whisperer Vardorvis Duke Sucellus

Slayer bosses

Minigame bosses

Skilling bosses

Raids

Chambers of Xeric	Tekton Vanguard Vespula Vasa Nistirio Muttadile Great Olm
Theatre of Blood	The Maiden of Sugadinti Pestilent Bloat Nylocas Vasilias Sotetseg Xarpus Verzik Vitur
Tombs of Amascut	Akkha Ba-Ba Kephri Zebak Tumeken's Warden Elidinis' Warden

Source site	Old School RuneScape Wiki
Canonical source	Dagannoth Rex
Content license	CC BY-NC-SA 3.0
License status	declared
Picture	Dagannoth Rex · file details