The combat stats of this monster may have changed since the Evolution of Combat update, and have not yet been confirmed in the live game. You can help the community by verifying the information in-game and then
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Habitat:
This version of Sigmund is fought during the Another Slice of H.A.M. quest, in the train tunnel leading from Dorgesh-Kaan to Keldagrim.
Notes:
Sigmund uses protection prayers, so it is necessary to use the special attack of the Ancient mace to disable them.