To begin your understanding of the Mok'Nathal, slay Vekh, leader of the Vekh'nir arakkoa. Then, return to Leoroxx at Mok'Nathal Village in the Blade's Edge Mountains.
<Leoroxx looks you in the eye with the kind of stare that chills your soul.>
You come to the Mok'Nathal, but you do not understand us. You do not understand our struggle to survive.
If you would understand us, then you will have to endure a taste of that struggle.
To the south are the Vekh'nir arakkoa. They have enslaved a group of ogres in the caverns known as Trogma's Claim and their leader, Vekh is in there.