Grab a Crate with Holes. Grab a Snufflenose Command Stick. Grab and read the Snufflenose Owner's Manual. In Razorfen Kraul, use the Crate with Holes to summon a Snufflenose Gopher, and use the Command Stick on the gopher to make it search for Tubers. Bring 6 Blueleaf Tubers, the Snufflenose Command Stick and the Crate with Holes to Mebok Mizzyrix in Ratchet.
Blueleaf tubers are a delicacy around the world! But they're rare, very rare. The only place to find them is here in the Barrens, deep in the earth, in Razorfen Kraul.
And even then, they're impossible to find unless you know just where to look! That's why I've trained these snufflenose gophers to find them for me. They have great noses and can smell a tuber from fifty paces away.
It won't be easy, but if you get me some tubers I'll pay you handsomely.