As you may know, wyverns are often tamed by orcs for use as mounts. But what is less known is that the venom of a wyvern, in some circles, is more valuable than the beast itself. So if you're not afraid to do a little wyvern hunting, then... I have a job for you.
There is a place called Highperch in the land of a Thousand Needles, west of here. The Highperch wyverns have a potent venom. Potent, and valuable.