Chief Overseer Mudlump at the Dragonmaw Base Camp in Shadowmoon Valley wants you to bring him 10 pieces of Knothide Leather and 1 Hardened Hide of Tyrantus.
So you're the new overseer, eh? Well there's one thing any good overseer needs and that's the proper disciplinary weapon. Before you can go out there and knock some sense into these peons you need to have your "piece." Each overseer has to gather the materials required to make their own "piece" and you'll be no different.
I'll need knothide leather and the hardened hide of Tyrantus. You'll find Tyrantus in Eco-Dome Farfield, located in the northern reaches of Netherstorm.