Zanza can create the ancient troll enchantments with the right components. The first is a primal Hakkari idol that must be taken from the most powerful of the Hakkari lieutenants: Jin'do and the Bloodlord.
The second is a punctured voodoo doll. These can be found in the piles of refuse that litter this foul place. Look inside the jinxed hoodoo.
Bring me these things and I will create a powerful enchantment for you!