Lunathron told you of a great, vile spider, Bogbereth, which hunts in Himbar.
'This next task you cannot possibly succeed at alone, or even with a fellowship of your closest allies. Nay, you must assemble a war-party if you are to defeat Bogbereth.
'No ordinary creature is she, Bogbereth, the Poison-queen of Himbar. You must strike swift and true against her, for her hide is as steel armour and her fangs are keen-edged daggers, dripping venom.
'Assemble your band of heroes and journey back to Torech-i-Bogbereth. You will find her there, unless she finds you first.'
Bogbereth hunts in the north-east reaches of Himbar, west and then north of Gath Forthnír.
Lunathron cautioned you not to face Bogbereth with anything less than a fully-armed war-party. She must be defeated, lest she continues to spawn more of her foul brood.
Gath Forthnír is in the eastern part of Himbar, south and east of Torech-i-Bogbereth.
Lunathron bade you destroy the great spider, Bogbereth. Now that she is no more, you can return to claim your victory.