Scurrius | OSRS Index

You have the option to create a private instance for this fight.

On death, all unprotected items will be moved to a grave outside the instance. Any items left on the ground will be lost.

This article has a strategy guide.

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

SoloGroup
Scurrius



Released		24 January 2024 (Update)
Members		Yes
Combat level		200
Size		3x3
Examine		You're never more than six feet away from one.
League region		Misthalin✓

Combat info

Attribute		Rat
XP bonus		+20%
Max hit		13 (Melee) 8 (Magic) 7 (Ranged) 22 (Rockfall)
Aggressive		Yes
Poisonous		No
Attack style		Magic, Ranged, Melee
Attack speed		4 ticks (2.4 seconds)
Respawn time		30 ticks (18 seconds)

Slayer info

Slayer level		None
Slayer XP		600 xp
Category		Rats
Assigned by

Combat stats


500	300	100	60	50	50

Aggressive stats


+150	+10	+150	+20	+150	+10

Melee defence


+20		+20		+20

Magic defence


+10			No elemental weakness

Ranged defence


+20		+20		+20

Immunities

Poison		0% resistance
Venom		Converts to poison
Cannons		Immune
Freeze		50% resistance

Open in DPS calculator
Advanced data

Monster ID		7222
Link		MOID

Scurrius, the Rat King is a boss residing in the Varrock Sewers. As a mid-level boss meant for players with a combat level of 60-90, Scurrius is meant to introduce various mechanics that are present in higher-level play, such as switching protection prayers quickly during combat as well as dodging attacks and managing multiple monsters mid-fight.

Scurrius can be fought in either the public room or in an instance. It has two distinct stats if the player is fighting it in the public or an instanced room; the public variant of Scurrius is stronger than the instanced version, and has many more Hitpoints. Ironmen can participate with other accounts and will receive killcount, although they will not receive any drops except medium clues if they can manage to attain MVP. Group Ironmen have access to a shared instance allowing them to fight Scurrius together.

Scurrius rewards a substantially greater amount of combat experience than normal, especially with rat bone weapons, giving competitive amounts of experience compared to Nightmare Zone and sand crabs, though high-levelled players will still be better off training combat through existing methods.

Although the boss drops rat meat, this meat cannot be cooked during the fight since players cannot light fires in its lair; attempting to do so produces the message, "It's far too damp for you to light a fire here."

Cannons cannot be set up in Scurrius's lair. Attempting to do so produces the message, "It's far too damp for you to set up a cannon in here."

Location

Location	Levels	Members	Spawns	Map	League region
Varrock Sewers	200, 250		1	Show map	Misthalin✓

Scurrius' lair is located within the Varrock Sewers, with the sewers being accessible via a manhole just east of Varrock Palace. The lair can be found east of the sewers entrance.

Players can enter or leave the lair by climbing through the broken bars or by crossing through sewage water, respectively; there will be an approximately 15 second delay after leaving before being able to rejoin.

Fight overview

Scurrius has three attacks: his melee attack with his tail, magic attack with blue lightning being discharged, and a ranged attack of stinky fur balls being thrown at players. The fight is split into three phases; Scurrius may heal from the Food Piles between each phase. While he is eating, he has a slight damage reduction applied to him. Scurrius may also summon six giant rats to aid him during the fight.

Money making

The following money making guide is available for Scurrius:

Method	Hourly profit	Skills
Killing Scurrius	196,657	60+ 43+

Drops (MVP/Solo)

Players will only roll this table if they dealt the most damage to Scurrius. (E.g., if they are in a private instance.)

Drop rates are estimated based on 896,502 samples from the Drop Rate Project, unless otherwise cited.

The average Scurrius kill is worth 9,530.68.

The average high alch value of a Scurrius kill is 8,778.75.

100%

	Item	Quantity	Rarity	Price	High Alch
	Big bones	1	Always	246	0
	Raw rat meat	1	Always	31	0

Weapons and armour

Item	Quantity	Rarity	Price	High Alch
Adamant platebody	1	6/100	9,440	9,984
Rune med helm	1	6/100	11,177	11,520
Rune full helm	1	6/100	20,616	21,120
Rune sq shield	1	6/100	22,747	23,040
Rune chainbody	1	6/100	29,611	30,000
Rune battleaxe	1	6/100	24,639	24,960

Runes and ammunition

Item	Quantity	Rarity	Price	High Alch
Adamant arrow	20–50	6/100	620–1,550	960–2,400
Rune arrow	20–50	6/100	940–2,350	4,800–12,000
Chaos rune	70–125	6/100	7,420–13,250	3,780–6,750
Death rune	40–90	3/100	7,400–16,650	4,320–9,720
Law rune	10–30	3/100	1,230–3,690	1,440–4,320

Consumables

Item	Quantity	Rarity	Price	High Alch
Trout	1–3	6/100	16–48	6–18
Tuna	1–3	6/100	48–144	24–72
Shark	1	3/100	1,053	102
Lobster	1–3	6/100	96–288	42–126
Ranging potion(1)	1	3/100	570	86
Super strength(1)	1	3/100	753	66
Cheese	1	1/100	56	2
Prayer potion(4)	1	6/100	9,165	114

Other

	Item	Quantity	Rarity	Price	High Alch
	Coins	1,000–9,000	6/100	1,000–9,000	1,000–9,000

Tertiary

Item	Quantity	Rarity	Price	High Alch
Clue scroll (medium)	1	1/25^{[d 1]}^{[d 2]}^[1]	Not sold	12
Scurrius' spine	1	1/33^{[d 3]}	Not sold	N/A
Long bone	1	1/400	Not sold	3
Curved bone	1	1/5,012.5	Not sold	4
Scurry	1	1/3,000^{[d 4]}	Not sold	N/A

^ The medium clue scroll drop rate increases to 1/23 after unlocking the medium Combat Achievements rewards tier.
^ Clue scrolls will drop as scroll boxes after the completion of X Marks the Spot.
^ Only one player may receive a spine per kill.
^ The player that does the most damage will receive a roll for the pet.^[2]

Drops (non-MVP)

Players will only roll this table if they are participating in a group kill and did not deal the most damage to Scurrius.

The average non-MVP Scurrius kill is worth 1,938.52.

The average high alch value of a non-MVP Scurrius kill is 1,543.7.

100%

	Item	Quantity	Rarity	Price	High Alch
	Big bones	1	Always	246	0

Runes and ammunition

Item	Quantity	Rarity	Price	High Alch
Adamant arrow	20–35	3/33	620–1,085	960–1,680
Rune arrow	20–35	3/33	940–1,645	4,800–8,400
Chaos rune	40–70	3/33	4,240–7,420	2,160–3,780
Death rune	30–50	3/33	5,550–9,250	3,240–5,400
Law rune	5–15	3/33	615–1,845	720–2,160

Consumables

Item	Quantity	Rarity	Price	High Alch
Trout	1–3	3/33	16–48	6–18
Tuna	1–3	3/33	48–144	24–72
Lobster	1–3	3/33	96–288	42–126
Shark	1	1/33	1,053	102
Ranging potion(1)	1	3/33	570	86
Super strength(1)	1	3/33	753	66
Cheese	1	1/33	56	2

Tertiary

	Item	Quantity	Rarity	Price	High Alch
	Scurrius' spine	1	1/33^{[d 1]}	Not sold	N/A

^ Only one player may receive a spine per kill.

Combat Achievements

There are 5 Combat Achievement tasks (totalling 8 points) available for Scurrius.

Name	Description	Type	Tier	Comp%
Scurrius Novice	Kill Scurrius once.	Kill Count	Easy (1 pt)	44.2%
Sit Rat	Finish off Scurrius with a ratbane weapon in a private instance.	Restriction	Easy (1 pt)	26.9%
Perfect Scurrius	Kill Scurrius in a private instance without taking damage from the following attacks: Tail Swipe and Falling Bricks. Pray correctly against the following attacks: Flying Fur and Bolts of Electricity.	Perfection	Medium (2 pts)	30.2%
Scurrius Champion	Kill Scurrius 10 times.	Kill Count	Medium (2 pts)	35.9%
Efficient Pest Control	Kill 6 Giant Rats within Scurrius' lair in 3 seconds.	Mechanical	Medium (2 pts)	24.1%

Gallery

A preliminary mockup, by Mod Sarnie.
Initial concept art of Scurrius, by Mod Skane.
An early 3D model of Scurrius.
A revised concept art of Scurrius.
A work-in-progress of Scurrius' walking animation.
A work-in-progress of Scurrius' walking animation.
The marketing image used to announce the release of Scurrius.

Changes

Date	Changes
28 February 2024 (Update)	Players can now toggle off the cooldown timer in the Steam Client. Items dropped in public rooms now disappear after three minutes.
7 February 2024 (Update)	Scurrius now properly appears in alphabetical order in the Collection Log interface, rather than being above Sarachnis. Group Ironmen can now enter Scurrius' lair together through a shared instance.
31 January 2024 (Update)	Scurrius now counts towards rat Slayer tasks. Combat Achievements were added for the boss. Scurrius now drops medium clue scrolls for the player who dealt the most damage at a rate of 1/25. Any big bones and rat meat left on the floor in the private instance will now disappear after the normal 2.5 minutes used outside instances. Other loot is left unchanged, remaining on the ground for much longer.

Trivia

A rat king is a collection of rats whose tails are intertwined and bound together in some way. Much like a real life rat king, the tails of the mage head and range head seem to be intertwined with the main tail as well.
The examine text refers to the myth that rats are always present in urban areas, even if the person doesn't see them.
Scurrius was originally conceived as a concept from the April 2023 Game Jam.
Unlike most large monsters, Scurrius drops its loot on the centre of the 3x3 tiles it occupies, rather than its south-westernmost tile. Long bones, curved bones, and medium clues are dropped on the south-westernmost tile, however.
It was hinted at during the 26 January 2024 Old School Live stream that one of the smaller rats is actually in control of Scurrius, presumably the mage head is in control of Scurrius itself.

References

^ Mod Goblin. "Scurrius & DT2 Combat Achievements". Reddit. 31 January 2024. Archived from the original on 31 January 2024. Mod Goblin: "Scurrius now drops Medium Clues at a rate of 1/25."
^ Jagex. Mod Ash's Twitter account. 24 January 2024. Archived from the original on 24 January 2024. Mod Ash: "[does scurrius have a pet drop mechanic like wildy bosses, or does it roll normally when done in masses?] I believe this one's rolled only for the MVP, if I'm reading my colleagues' code correctly."

v t e Scurrius
Monsters	Scurrius Giant rat
Unique drops	Scurrius' spine Scurry
Equipment	Bone mace Bone shortbow Bone staff
Other	Strategies Big rat Broken bars Food Pile Historian Aldo Antique lamp Oh Rats!

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

Varrock Sewers

NPCs

	Grimesquit Historian Aldo Phingspet Trotters
Monsters	Deadly red spider Ghost Giant rat Giant spider Growthling Moss giant Rat Scorpion Skeleton Spider Zombie
Bosses	Bryophyta Scurrius

Items

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