Skullsplitter Tusk

is a quest item only lootable by players on the quest. Kebok in Booty Bay has been hiring adventurers to hunt Skullsplitter trolls for their tusks, which he then passes off as tiger fangs.

Source
drop from Skullsplitter trolls throughout Stranglethorn Vale. These trolls can be found in the three central troll ruins (Ziata'jai Ruins, Ruins of Zul'Mamwe, and Balia'mah Ruins).

Trolls that drop :
 * Skullsplitter Warrior level 39-40
 * Skullsplitter Axe Thrower level 39-40
 * Skullsplitter Mystic level 39-40
 * Skullsplitter Scout level 41-42
 * Skullsplitter Hunter level 41-42
 * Skullsplitter Berserker level 43-44
 * Skullsplitter Spiritchaser level 44
 * Skullsplitter Witch Doctor level 41-42
 * Skullsplitter Beastmaster level 41-42
 * Skullsplitter Headhunter level 43-44
 * Ana'thek the Cruel  level 45

As a Quest Objective

 * - from at Booty Bay in Stranglethorn Vale
 * Required:
 * Skullsplitter Tusk x18