In Speaking with Nezzliok, the dead witch doctor Nezzliok asks you to steal trophies from the Bloodscalp's enemies, the Skullsplitters. After you do this, he will reveal the whereabouts of the Darkspear chief's son, Yenniku. You must also complete to proceed to the next quest in this chain. This quest is in a long chain, all available in Grom'gol, the first being which can be obtained from Nimboya at the north exit to the camp.
You will need:
The Skullsplitters have ruins throughout central and eastern Stranglethorn Vale. The three trophies you are looking for must come from three different ruins: The Balia'ma, the Ziata'jai, and the Zul'Mamwe. To get a trophy, simply right-click on a pile of skulls in each of the ruins.
Turn this quest in back at the Bubbling Cauldron near the northern exit of Grom'gol Base Camp.
<The head of Nezzliok speaks.>
It is true. I know where the child of the Darkspears was taken. You have bested me and bound my spirit, but I will say nothing without appeasement!
The Bloodscalps war with the Skullsplitters. To gain my favor, steal from the Skullsplitters 3 of their trophy skulls and place them here with us, so that my spirit will have slaves in the Nether. One skull must be from their trophy pile in Balia'mah, another from Ziata'jai, and the last from Zul'Mamwe.
You will be rewarded with the following:
- 240-2350 XP
- Darkspear Trolls +150 rep
I await the skulls...
Yes. These will serve me well. When my spirit is freed, I will enter the Nether with three fine servants!
You are a credit to your <race> clan, and you have appeased me.