Dagannoth Rex

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
Aggressive stats
Melee defence
Magic defence
+10	35% weakness
Ranged defence
Immunities
Poison	Not immune
Venom	Converts to poison
Cannons	Not immune
Thralls	Not immune
	Open in DPS calculator
Advanced data
Monster ID	2267
Link	MOID

This article has a strategy guide.

All information on mechanics and strategy will be on this page.

This article has a Slayer task guide here.

Information comparing locations for Slayer tasks will be on this page.

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

Dagannoth Rex has an extremely low Magic Defence, so it is recommended to use Magic against him. Popular choices include Slayer 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)	936,692	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 40,241.48.

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 41,973.44.

Excluding berserker ring drops, the average kill is worth 16,220.00.

100%

	Item	Quantity	Rarity	Price	High Alch
	Dagannoth bones	1^{[d 1]}	Always	12,033	90
	Dagannoth hide	1	Always	81	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	296	510
Mithril warhammer	1	11/128	919	996
Adamant axe	1	7/128^[1]	985	768
Steel platebody	1	4/128	875	1,200
Mithril pickaxe	1	3/128	426	780
Adamant platebody	1	2/128	9,522	9,984
Fremennik blade	1	2/128	Not sold	3,000
Dragon axe	1	1/128^[2]^[3]	86,046	33,000
Rune axe	1	1/128	7,266	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	1,180	1,560
Ring of life	1	1/128	1,892	2,115
Rock-shell plate	1	1/128^[4]	38,619	39,000
Rock-shell legs	1	1/128^[4]	38,385	38,400
Berserker ring	1	1/128^[2]^[3]^[4]	3,074,654	6,000
Warrior ring	1	1/128^[2]^[3]^[4]	57,224	6,000

Potions

Item	Quantity	Rarity	Price	High Alch
Antifire potion(2)	1	1/128	621	118
Prayer potion(2)	1	1/128	4,220	68
Restore potion(2)	1	1/128	48	39
Super attack(2)	1	1/128	1,254	81
Super strength(2)	1	1/128	1,767	99
Super defence(2)	1	1/128	1,758	118
Zamorak brew(2)	1	1/128	597	90

Ores and bars

Item	Quantity	Rarity	Price	High Alch
Mithril ore	25 (noted)	10/128	3,525	2,425
Adamantite bar	1	3/128	1,977	384
Coal	100 (noted)	2/128	15,900	2,700
Iron ore	150 (noted)	1/128	12,000	1,500
Steel bar	15–30 (noted)	1/128	8,070–16,140	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	182	2
Body talisman	1	1/896	1,632	2
Earth talisman	1	1/896	465	2
Fire talisman	1	1/896	1,854	2
Mind talisman	1	1/896	1,370	2
Water talisman	1	1/896	208	2
Cosmic talisman	1	1/2,240	145	2
Chaos talisman	1	1/2,986.7	217	2
Nature talisman	1	1/2,986.7	224	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	5,383	18
Bass	5	7/128	325	120
Swordfish	5	4/128	980	240
Shark	5	1/128	4,560	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]}	284	15
Loop half of key	1	1/95.67; 1/89.95^{[d 2]}	10,458	60
Tooth half of key	1	1/95.67; 1/89.95^{[d 2]}	10,470	60
Uncut emerald	1	1/91.02; 1/46.22^{[d 2]}	541	30
Uncut ruby	1	1/182.04; 1/92.44^{[d 2]}	1,221	60
Runite bar	1	1/409.6	12,223	3,000
Nature rune	67	1/682.67	7,035	7,236
Rune 2h sword	1	1/682.67	37,876	38,400
Rune battleaxe	1	1/682.67	24,490	24,960
Law rune	45	1/1,024	5,670	6,480
Death rune	45	1/1,024	8,325	4,860
Steel arrow	150	1/1,024	1,800	1,050
Rune arrow	42	1/1,024	3,108	10,080
Adamant javelin	20	1/1,024	620	1,920
Rune sq shield	1	1/1,024	22,554	23,040
Dragonstone	1	1/1,024	11,162	6,000
Silver ore	100 (noted)	1/1,024	6,300	4,500
Nature talisman	1	1/485.45; 1/246.52^{[d 2]}	224	2
Uncut diamond	1	1/728.18; 1/369.78^{[d 2]}	2,752	120
Rune kiteshield	1	1/2,048	32,027	32,640
Dragon med helm	1	1/2,048	58,462	60,000
Rune spear	1	1/1,997.29; 1/216.1^{[d 2]}^{[d 3]}	11,887	12,480
Rune javelin	5	1/1,456.36; 1/739.56^{[d 2]}	965	1,200
Shield left half	1	1/3,994.58; 1/432.21^{[d 2]}^{[d 3]}	65,082	66,000
Dragon spear	1	1/5,326.1; 1/576.28^{[d 2]}^{[d 3]}	39,041	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	825	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)	18.6%
Dagannoth Rex Champion	Kill Dagannoth Rex 10 times.	Kill Count	Medium (2 pts)	41.9%
Dagannoth Rex Adept	Kill Dagannoth Rex 25 times.	Kill Count	Hard (3 pts)	38.1%
Death to the Warrior King	Kill Dagannoth Rex whilst under attack by Dagannoth Supreme and Dagannoth Prime.	Mechanical	Elite (4 pts)	12%
Toppling the Diarchy	Kill Dagannoth Rex and one other Dagannoth king at the exact same time.	Mechanical	Elite (4 pts)	5.8%

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"

[1] Dropped in noted form if the player has completed the elite tier of the Fremennik diary

[nothing-7] The "nothing" drop is removed while wearing a ring of wealth.

[row-8] 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.

[legend-9] 3.0 ^3.1 ^3.2 Slightly reduced chance of dropping if Legends' Quest has not been completed.

[10] Dagannoth ribs are only dropped during Rag and Bone Man II.

[11] The hard clue scroll drop rate increases to 1/39 after unlocking the hard Combat Achievements rewards tier.

[box-12] 3.0 ^3.1 Clue scrolls will drop as scroll boxes after the completion of X Marks the Spot.

[13] Brimstone keys are only dropped if killed on a Slayer task given by Konar quo Maten.

[14] The elite clue scroll drop rate increases to 1/712 after unlocking the elite Combat Achievements rewards tier.

[2] Jagex. Mod Ash's Twitter account. 2 May 2017. Archived from the original on 15 April 2019. Mod Ash: "7/128 chance from Rex."

[Drop_Rates_V2-3] 2.0 ^2.1 ^2.2 ^2.3 Envision. "Drop Rates V2." Old School RuneScape Forums.

[Ash_tweet_unique_rates-4] 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."

[Armour+Rings-5] 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."

[6] 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."

[Confirmed_droprates-15] 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"

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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