Invasion plans
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All information on mechanics and strategy will be on this page.
Release date 13 March 2014 (Update)
Members? Yes
Combat level 470
Always drops Big bones
I wouldn't want to eat his Porridge.
Combat info
Hitpoints 255
Aggressive Yes
Poisonous No
Max hit 60
Weakness Slash
Attack Styles
Melee (crush)
Slayer icon Slayer info
Slayer level 1
Slayer XP 312
Category Boss, Bear
Assigned by
Turael chatheadKrystilia chatheadMazchna chatheadNieve chatheadDuradel chathead
Combat icon Combat stats
Attack icon Strength icon Defence icon Magic icon Ranged icon
350 370 440 1 1
Attack icon Aggressive stats
White dagger White scimitar White warhammer Magic icon Ranged icon
+0 +0 +0 +0 +0
Defence icon Defensive stats
White dagger White scimitar White warhammer Magic icon Ranged icon
+135 +104 +175 +900 +230
Other bonuses Immunities
Attack icon
Strength icon
Ranged Strength icon
Magic Damage icon
Poison hitsplat
Venom hitsplat
+0 +0 +0 +0 Immune Immune
Attack speed
Monster attack speed 6

Callisto is an enormous bear that resides south of the Demonic Ruins, and is the only monster to drop the tyrannical ring. He attacks using melee. He can knock players back a few tiles, which renders them unable to move for a few seconds, as well as heal himself slightly. He is also able to perform a deadly shockwave attack that can hit up to 60.

Callisto is immune to Magic damage, although spells with effects such as Vulnerability will still affect him.


Main article: Callisto/Strategies



Item Quantity Rarity GE market price
Big bones Big bones 1 Always 252


Item Quantity Rarity GE market price
Rune pickaxe Rune pickaxe 1 Common 18,843
Rune 2h sword Rune 2h sword 1 Uncommon 37,888
Dragon pickaxe Dragon pickaxe 1 Rare (1/171) 4,142,595
Dragon 2h sword Dragon 2h sword 1 Rare (1/256) 132,058
Tyrannical ring Tyrannical ring 1 Rare (1/512) 2,279,641


Item Quantity Rarity GE market price
Soul rune Soul rune 250 Uncommon 36,750
Death rune Death rune 300 Uncommon 65,400
Chaos rune Chaos rune 400 Uncommon 37,600
Blood rune Blood rune 200 Uncommon 41,000


Item Quantity Rarity GE market price
Herb seed 5 Snapdragon seed 3 Uncommon 138,894
Herb seed 5 Ranarr seed 5 Uncommon 185,630
Yew seed 5 Yew seed 1 Rare (1/128) 70,567
Magic seed 5 Magic seed 1 Rare (1/128) 184,658
Palm tree seed 5 Palm tree seed 1 Rare (1/128) 70,734


Item Quantity Rarity GE market price
Dark crab Dark crab 8 Common [1] 8,736
Super restore(4) Super restore(4) 3 Common [1] 28,290
  1. 1.0 1.1 8 dark crabs are dropped along with 3 Super restore (4).


Item Quantity Rarity GE market price
Coins 10000 Coins 12,000–20,000 Common Not sold
Uncut ruby Uncut ruby 20 (noted) Uncommon [1] 30,080
Uncut diamond Uncut diamond 10 (noted) Uncommon [1] 32,040
Coconut Coconut 60 (noted) Uncommon 12,240
Supercompost Supercompost 100 (noted) Uncommon 48,200
Crushed nest Crushed nest 75 (noted) Uncommon 206,400
Cannonball Cannonball 250 Uncommon 50,500
Magic logs Magic logs 100 (noted) Uncommon 103,600
Limpwurt root Limpwurt root 50 (noted) Uncommon 11,350
Red dragonhide Red dragonhide 75 (noted) Uncommon 174,750
Mahogany logs Mahogany logs 400 (noted) Uncommon 144,400
Mysterious emblem Mysterious emblem 1 Uncommon (1/27.5)[2] 123,685
Looting bag Looting bag 1 Uncommon (1/30) Not sold
Slayer's enchantment Slayer's enchantment 1 Uncommon (1/30)[3] 1,305
Clue scroll (elite) Clue scroll (elite) 1 Rare (1/100)[4] Not sold
Uncut dragonstone Uncut dragonstone 1 Rare (1/128) 13,980
Grimy toadflax Grimy toadflax 100 (noted) Rare (1/128) 277,800
Dark fishing bait Dark fishing bait 375 Rare (1/128) 1,125
Long bone Long bone 1 Rare (1/400) Not sold
Callisto cub Callisto cub 1 Very rare (1/2,000) Not sold
Curved bone Curved bone 1 Very rare (1/5,000) Not sold
  1. 1.0 1.1 20 uncut rubies are dropped along 10 uncut diamonds.
  2. Only dropped while on a slayer assignment given by Krystilia, unless the kill was done on the official Bounty Hunter world. Killing Callisto on the Bounty Hunter also increases the drop rate from 1/27.5 to 1/5.
  3. Only dropped while on a slayer assignment given by Krystilia.
  4. 1/50 if a Ring of wealth (i) is worn.


  • Callisto is named after one of the Greek god Zeus' many lovers, who was turned into the constellation Ursa Major.
  • Upon release, Callisto had a slightly worse drop table. In addition, players could exploit his low Magic by safespotting him with the trident of the seas behind a cluster of skeletons north of him. The cluster of skeletons have been removed and Callisto is now immune to Magic damage.
    • He also used to be able to use his knock-back attack more often. This was changed in an update on 8 February 2018.
  • Callisto is the name of one of Jupiter's moons.
  • 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 popular colloquialism, "Does a bear shit in the woods?"