This quest is not given by Thorth (he lives in Forochel), but by Odbjórn after compliting "The Enemy's Arms" from Throst.
Throst and Odbjórn can both be found in Angmar.
The objective is to collect 5 rugged warghides and 1 white warghide.
Selecteble rewards:
Lâmkarn's Hide:
Medium Armour
251 Armour
+3% Wound Resistance
+29 Vitality
Reduces incoming common damage most of the time.
Durability 65/65 Normal
Lainthol :
Heavy Armour
101 Armour
+15 Fate
+44 Maximum Morale
+29 Vitality
Durability 90/90
Ancient Arrowhead:
Bauble
+15 Might
-1% Ranged Vulnerability
+15 Agility
+1% Evade Chance
Durability 100/100