Chaos dwarves are a type of corrupted and dangerous dwarves following Zamorak found in various locations, most notably the Wilderness. It is revealed in Forgettable Tale of a Drunken Dwarf that they are the result of experiments by The Red Axe in their attempt to conquer Keldagrim.
On occasion, they may drop a muddy key, which can be used to unlock the muddy chest deep in the Wilderness, which contains an assortment of mid-level items. Both the dwarves in the Wilderness and Taverley Dungeon drop the Muddy Key.
The physical form of chaos dwarves are unlike any other dwarf in Gielinor. The Lores and Histories entry "The Coat Thief" describes the appearance of a chaos dwarf:
"He was like no dwarf I'd ever seen in Keldagrim. His skin was dark red and had a rough texture, and it seemed to glow from within like lava... Even unconscious, his face was locked in a grimace of rage. He smelled of sulphur and radiated unmistakable heat...
"...The heat was growing stronger. I stepped back, and Hilda did the same. The dwarf's skin glowed brighter and brighter red and then began to disintegrate, crumbling in on itself like wood curling up in a fire... In less than a minute he was gone, leaving only a few bones and some scorched armour fragments in a thinning cloud of black smoke..."
Rare drop table
In addition to the drops above, this monster also has access to the rare drop table.
|Loop half of key||1||Common||10,342||60|
|Tooth half of key||1||Common||10,206||60|
|Rune 2h sword||1||Uncommon||37,933||38,400|
|Rune sq shield||1||Uncommon||22,597||23,040|
|Silver ore||100 (noted)||Uncommon||6,300||4,500|
|Dragon med helm||1||Rare||59,252||60,000|
|Shield left half||1||Rare||65,793||66,000|