Gnomus at Wildhammer Stronghold in Shadowmoon Valley wants you to recover Felspine's Hide.
Long story short, I used to work with a blood elf named Tiorus. My partnership with Tiorus dissolved once I got into gourmet living. He decided to take it upon himself to continue our research using MY inventions. Anyhow, he had some of his Horde goons using my arcano-scorp probes at the Ruins of Baa'ri lava flow and discovered the mother of all diemetradons!
I need you to get there before he does and kill the diemetradon, Felspine, and bring his hide back to me.