Helchgam is a boss encountered within Carn Dûm in northern Angmar, with the entrance located at approximately [11.1N, 33.8W]. He is the source of the water's corruption.

Location - Angmar - Carn Dûm
Level - 52
Type - Nemesis
Race - Nameless
Morale - 47,225
Power - 8,946
Drops Item - Tentacle of Helchgam
(Trophy item Tentacle of Helchgam can be used at Taxidermist. BOA)
Tentacle of Helchgam - Large Furniture - Helchgam's tentacles are animated (moving in the barrel)