From MineScape Wiki

MineScape Bosses

Bosses are challenging monsters with unique rewards. All information is pulled from the in game /mobs command and models from the GitHub. Some bosses may not be currently implemented on the live servers.

Bosses Combat Level
Ahrim the Blighted 98
Karil the Tainted 98
Guthan the Infested 115
Dharok the Wretched 115
Torag the Corrupted 115
Verac the Defiled 115
Obor 106
Bryophyta 128
Growthling 37
Crazy Archaeologist 204
Giant Mole 230

Quest Bosses

Quest Bosses Combat Level Quest
Count Draynor 34 Vampire Slayer
Delrith 27 Demon Slayer
Tree Spirit 101 Lost City
Temple Guardian 30 Priest in Peril
Skeleton 13? Restless Ghost
Witch's experiment 19, 30, 42, 53 Witch's House

Unreleased Bosses

Unreleased Bosses with Models in the Game Files
Bouncer Bouncer
Demonic gorilla
General khazard
King black dragon King black dragon
Tztok jad
Thermonuclear smoke devil