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.
Item Quantity Rarity GE market price Big bones 1 Always 217
Item Quantity Rarity GE market price Rune pickaxe 1 Common 18,811 Rune 2h sword 1 Uncommon 37,953 Dragon pickaxe 1 Rare (1/171) 5,740,183 Dragon 2h sword 1 Rare (1/256) 132,635 Tyrannical ring 1 Rare (1/512) 1,299,089
Item Quantity Rarity GE market price Soul rune 250 Uncommon 36,750 Death rune 300 Uncommon 66,000 Chaos rune 400 Uncommon 39,200 Blood rune 200 Uncommon 71,200
Item Quantity Rarity GE market price Uncut ruby 20 (noted) Uncommon  29,260 Uncut diamond 10 (noted) Uncommon  30,690 Coconut 60 (noted) Uncommon 75,840 Crushed nest 75 (noted) Uncommon 278,925 Magic logs 100 (noted) Uncommon 107,700 Limpwurt root 25 (noted) Uncommon 24,400 Red dragonhide 75 (noted) Uncommon 183,975 Mahogany logs 400 (noted) Uncommon 128,800 Uncut dragonstone 1 Rare (1/128) 15,796 Grimy toadflax 100 (noted) Rare (1/128) 160,000
Item Quantity Rarity GE market price Snapdragon seed 3 Uncommon 149,178 Ranarr seed 5 Uncommon 184,760 Yew seed 1 Rare (1/128) 78,024 Magic seed 1 Rare (1/128) 128,156 Palm tree seed 1 Rare (1/128) 35,069
Item Quantity Rarity GE market price Dark crab 8 Common  10,752 Super restore(4) 3 Common  27,912
Item Quantity Rarity GE market price Coins 12,000–20,000 Common Not sold Supercompost 100 (noted) Uncommon 41,600 Cannonball 250 Uncommon 40,500 Mysterious emblem 1 Uncommon (1/27.5) 179,863 Looting bag 1 Uncommon (1/30) Not sold Slayer's enchantment 1 Uncommon (1/30) 1,560 Clue scroll (elite) 1 Rare (1/100) Not sold Dark fishing bait 375 Rare (1/128) 1,125 Long bone 1 Rare (1/400) Not sold Callisto cub 1 Very rare (1/2,000) Not sold Curved bone 1 Very rare (1/5,000) Not sold
- ↑ 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.
- ↑ Only dropped while on a slayer assignment given by Krystilia.
- ↑ 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.
- 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?", a rhetorical question in response to something where the answer is obviously yes.
Wilderness bosses and rewards