TBC Frankly, It Makes No Sense... HD
http://www.wowhead.com/quest=10672
Researcher Tiorus at Shadowmoon Village in Shadowmoon Valley wants you to travel to the lava flow near the Ruins of Baa'ri and use the Arcano Control Unit to control an Arcano-Scorp, swim in the lava with the Arcano-Scorp, and tag 8 Greater Felfire Diemetradons.