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 Ranged-icon Magic-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
Strength-icon RangedStrength-icon Attack-icon Poison hitsplat Venom hitsplat
+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 229


Item Quantity Rarity GE market price
Rune pickaxe Rune pickaxe 1 Common 18,828
Rune 2h sword Rune 2h sword 1 Uncommon 37,974
Dragon pickaxe Dragon pickaxe 1 Rare (1/171) 4,131,128
Dragon 2h sword Dragon 2h sword 1 Rare (1/256) 133,709
Tyrannical ring Tyrannical ring 1 Rare (1/512) 3,317,446


Item Quantity Rarity GE market price
Soul rune Soul rune 250 Uncommon 36,750
Death rune Death rune 300 Uncommon 74,700
Chaos rune Chaos rune 400 Uncommon 39,200
Blood rune Blood rune 200 Uncommon 44,800


Item Quantity Rarity GE market price
Herb seed 5 Snapdragon seed 3 Uncommon 144,696
Herb seed 5 Ranarr seed 5 Uncommon 186,130
Yew seed 5 Yew seed 1 Rare (1/128) 82,096
Magic seed 5 Magic seed 1 Rare (1/128) 221,021
Palm tree seed 5 Palm tree seed 1 Rare (1/128) 81,563


Item Quantity Rarity GE market price
Dark crab Dark crab 8 Common [1] 7,768
Super restore(4) Super restore(4) 3 Common [1] 29,700
  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] 30,260
Uncut diamond Uncut diamond 10 (noted) Uncommon [1] 30,560
Coconut Coconut 60 (noted) Uncommon 13,500
Supercompost Supercompost 100 (noted) Uncommon 43,500
Crushed nest Crushed nest 75 (noted) Uncommon 279,825
Cannonball Cannonball 250 Uncommon 42,500
Magic logs Magic logs 100 (noted) Uncommon 107,300
Limpwurt root Limpwurt root 50 (noted) Uncommon 11,750
Red dragonhide Red dragonhide 75 (noted) Uncommon 172,500
Mahogany logs Mahogany logs 400 (noted) Uncommon 174,000
Mysterious emblem Mysterious emblem 1 Uncommon (1/27.5)[2] 152,818
Looting bag Looting bag 1 Uncommon (1/30) Not sold
Slayer's enchantment Slayer's enchantment 1 Uncommon (1/30)[3] 1,973
Clue scroll (elite) Clue scroll (elite) 1 Rare (1/100)[4] Not sold
Uncut dragonstone Uncut dragonstone 1 Rare (1/128) 13,316
Grimy toadflax Grimy toadflax 100 (noted) Rare (1/128) 266,900
Dark fishing bait Dark fishing bait 375 Rare (1/128) 1,500
Callisto cub Callisto cub 1 Very rare (1/2,000) 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 world 318, the official Bounty Hunter world. Killing Callisto on world 318 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?"