Callisto

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.

Callisto
Released								13 March 2014 (Update)
Members								Yes
Combat level								470
Size								5x5
Examine								I wouldn't want to eat his Porridge.
Combat info
XP bonus								+30%
Max hit								55 (Crush) 31 (Ranged) 50 (Special)
Aggressive								Yes
Poisonous								No
Attack style								Crush, Magic, Ranged
Attack speed								4 ticks (2.4 seconds)
Respawn time								11 ticks (6.6 seconds)
Slayer info
Slayer level								None
Slayer XP								1,300 xp
Category								Bears, Bosses
Assigned by
Combat stats
1,000				350				300				225				140				200
Aggressive stats
+0				+0				+0				+0				+100				+30
Melee defence
+150								+130								+125
Magic defence
+0												30% weakness
Ranged defence
+50								+50								+50
Immunities
Poison								100% resistance
Venom								100% resistance
Cannons								Immune
Thralls								Not immune
Open in DPS calculator
Advanced data
Monster ID								6609
Link								MOID

Callisto is an enormous bear empowered by the corruption of the Wilderness that resides in Callisto's Den at level 40 Wilderness and is the one of two monsters to drop the tyrannical ring.

Ironmen are eligible for drops from Callisto when defeating it alongside other players.

In order to enter Callisto's lair, the player must have completed the medium Wilderness Diary tasks, OR they must have a Callisto boss Slayer task (a bear Slayer task does not bypass the diary requirement). Entering the boss lair requires players to pay a fee of 50,000 coins; this fee does not need to be brought along in the inventory, and can be deducted from the bank.

Location	Levels	Members	Spawns	Map	League region
Callisto's Den	470		1	Show map	Wilderness✓

Callisto primarily attacks with melee, but will use ranged against players if he cannot reach them. His melee attack deals massive damage and shatters into other players near his current target. His melee attack has a minimum hit of 35.^[1]

If Callisto is not already frozen and the attacking player has equipment with a total Magic accuracy greater than 0, the first attack that would freeze the boss is guaranteed to hit and freeze Callisto.

At specific health intervals (66% and 33%), Callisto lifts his head, becomes unfrozen, and deploys bear traps that snare and damage players when stepped on. Callisto can be re-frozen after he returns to normal stance.

Callisto will occasionally send out a slow magic attack towards the player. If the player is not praying Protect from Magic when the attack reaches the player, this will result in the player being knocked back and temporarily stunned, in addition to taking a large amount of damage if the player is knocked into a wall.

Protection prayers will negate all ranged and magic damage of his attacks, but Protect from Melee will only reduce the damage by ~50%.

The following money making guide is available for Callisto:

The listed quantities are for soloing Callisto. In group encounters, Callisto's drops, including uniques, will be split proportionally based on damage done. Up to 10 players may obtain drops per kill in this manner, and each of the top 10 players will receive at least 25% of the solo loot quantity.

Ironmen must deal 7% of the overall damage to be eligible for 25% of the solo loot quantity. Ironmen dealing less than 7% damage will receive a minimum of 5% of the solo loot quantity.

The average solo Callisto kill is worth 142,442.54.

	Item	Quantity	Rarity	Price	High Alch
	Big bones	1	Always[d 1]	246	0
	Bones	1	Always[d 2]	30	0

The drop rates for uniques are for each kill, rather than for each player. At most one item from this table is dropped per kill.^[2]

Odds of hitting the unique table ~1/56.67

	Item	Quantity	Rarity	Price	High Alch
	Claws of callisto	1	1/196[3]	47,322	48,000
	Dragon 2h sword	1	1/256[3]	131,999	132,000
	Dragon pickaxe	1	1/256[3]	575,223	58,770
	Voidwaker hilt	1	1/360[3]	2,097,289	480,000
	Tyrannical ring	1	1/512[3]	127,572	30,000

	Item	Quantity	Rarity	Price	High Alch
	Mystic earth staff	4 (noted)	2/126	99,688	102,000
	Mystic robe top	4 (noted)	2/126	284,884	288,000
	Mystic robe bottom	4 (noted)	2/126	189,040	192,000
	Rune pickaxe	5 (noted)	8/126	93,185	96,000
	Rune 2h sword	3 (noted)	3/126	114,369	115,200
	Rune kiteshield	4 (noted)	2/126	128,440	130,560
	Rune platebody	4 (noted)	2/126	154,188	156,000

	Item	Quantity	Rarity	Price	High Alch
	Blood rune	500	7/126	187,000	120,000
	Death rune	700	7/126	129,500	75,600
	Chaos rune	900	7/126	95,400	48,600
	Soul rune	450	5/126	171,000	81,000
	Steel cannonball	600	4/126	163,200	1,800

	Item	Quantity	Rarity	Price	High Alch
	Uncut ruby	50 (noted)	4/126	54,350	3,000
	Uncut diamond	25 (noted)	3/126	60,975	3,000
	Uncut dragonstone	5 (noted)	2/126	74,880	3,000
	Limpwurt root	100 (noted)	5/126	22,900	400
	Magic logs	225 (noted)	5/126	171,900	43,200
	Mahogany logs	600 (noted)	6/126	93,000	18,000
	Red dragonhide	170 (noted)	3/126	352,240	14,790
	Coconut	135 (noted)	2/126	212,625	7,020
	Grimy toadflax	100 (noted)	1/126	189,900	1,100
	Grimy dwarf weed	45 (noted)	1/126	60,435	630
	Grimy ranarr weed	45 (noted)	1/126	236,790	810
	Grimy snapdragon	45 (noted)	1/126	324,810	540

	Item	Quantity	Rarity	Price	High Alch
	Ranarr seed	11	5/126	308,308	330
	Snapdragon seed	5	5/126	218,865	180

	Item	Quantity	Rarity	Price	High Alch
	Coins	50,000	10/126	50,000	50,000
	Dark crab	50 (noted)	5/126	72,950	9,600
	Super restore(4)	10 (noted)	5/126	99,750	1,800
	Supercompost	225 (noted)	4/126	6,300	11,475
	Dragon bones	75 (noted)	3/126	249,300	7,200
	Blighted anglerfish	100 (noted)	1/126	8,300	3,000
	Wilderness crabs teleport	4	3/126	73,756	148

	Item	Quantity	Rarity	Price	High Alch
	Blighted anglerfish	5–6	1/18	415–498	150–180
	Blighted karambwan	5–6	1/18	230–276	150–180
	Blighted super restore(3)	3–4	1/18	Not sold	69–92
	Blighted super restore(4)	3–4	1/18	8,658–11,544	72–96
	Ranging potion(2)	2–3	1/18	1,966–2,949	258–387
	Super combat potion(2)	2–3	1/18	12,044–18,066	108–162

	Item	Quantity	Rarity	Price	High Alch
	Looting bag	1	1/3	Not sold	N/A
	Brimstone key	1	1/50[d 1]	Not sold	N/A
	Clue scroll (elite)	1	1/100; 1/50[d 3][d 4][d 2]	Not sold	12
	Long bone	1	1/400	Not sold	3
	Callisto cub	1	1/1,500[d 5][3]	Not sold	N/A
	Curved bone	1	2/10,025	Not sold	4

The following drops are only accessible while on a Slayer task given by Krystilia.

	Item	Quantity	Rarity	Price	High Alch
	Larran's key	1	1/50	120,992	54
	Slayer's enchantment	1	1/30	1,614	720

There are 2 Combat Achievement tasks (totalling 7 points) available for Callisto.

Name	Description	Type	Tier	Comp%
Callisto Adept	Kill Callisto 10 times.	Kill Count	Hard (3 pts)	22%
Callisto Veteran	Kill Callisto 20 times.	Kill Count	Elite (4 pts)	20.2%

From his release to 25 January 2023, Callisto only had three mechanics; a shockwave attack that could deal up to 60 damage, a roar that would send players flying and a small chance to heal himself slightly. He only used melee, which could be fully blocked by protection prayers.

His stats were also different:

Combat stats
2014	225	350	370	440	1	1
2023	1,000	350	300	225	1	200
Aggressive stats
2014	+0	+0	+0	+0	+0	+0
2023	+0	+0	+0	+0	+100	+30
Defensive stats
2014	+135	+104	+175	+900	+230
2023	+150	+130	+125	+0	+50

• Concept art of Callisto's Den, by Mod Grub.

• Callisto's 2014 model was a recoloured version of the arctic bear Summoning familiar model extracted from the August 2007 Archive of RuneScape. Summoning assets were re-used to make new monsters due to the Old School team's small size and lack of artists in the game's early years.
  • His shockwave attack uses the same projectile and sound as the King Black Dragon's icy breath.
• Callisto is named after one of the Greek god Zeus' many lovers (and consequently, one of Jupiter's moons), who was turned into the constellation Ursa Major, depicting a bear.
  • Although Callisto's namesake in Greek mythology is female, the examine refers to the boss in-game as male.
• His examine text is a reference to Goldilocks and the Three Bears.
• There is a pile of bear droppings in the woods south of his spawn, with the examine text "Now you know.", a reference to the colloquialism "does a bear shit in the woods?", which is a rhetorical question in response to something where the answer is obviously yes.
• Despite being a boss variant of the bear, Callisto is unable to drop ensouled bear heads, even though other bosses like Scorpia and the Kalphite Queen drop ensouled scorpion and kalphite heads respectively.
• When asking Krystilia for tips about a Callisto Slayer assignment, she advises that he "roams the Wilderness", though this is no longer true since he was moved to a cave in the 2023 Wilderness boss rework.

v t e 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	Shellbane gryphon Grotesque Guardians (Dusk) (Dawn) Abyssal Sire Kraken Cerberus Araxxor Thermonuclear smoke devil Alchemical Hydra
Minigame bosses	Crystalline Hunllef Corrupted Hunllef TzTok-Jad TzKal-Zuk Sol Heredit
Skilling bosses	Tempoross Wintertodt Zalcano
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