At the centre of the Bleakmere, there lies a small isle, upon which a fell spirit named Umhen has gathered his foul minions.
'The foul sorcery of Sâd Doldúr has attracted many fell spirits of Morgoth into the Ashenslades. Among them is a singularly evil creature known as Umhen. This spirit summons all others to a small isle at the centre of the Bleakmere, though we know not for what nefarious purpose.
'These spirits do not belong in Middle-earth and can only mean ill for the Malledhrim. I would ask you to seek out Umhen and his minions and banish them back beyond the Void.
'Umhen's isle can be found by travelling south down the mountain, past Sâd Doldúr, at the centre of the Bleakmere.'
Umhen's isle lies to the south of Barad Angol, at the centre of the Bleakmere.
Faerchiril has asked you to seek out and defeat the fell spirit Umhen and his minions.
Faerchiril is at Barad Angol due north of Umhen's isle, up the mountain.
You should return to Faerchiril and let her know that Umhen and his minions have been defeated.