In this quest area of Shadowmoon Valley, you're are supposed to go to the lava flows just outside the Ruins of Baa'ri and use one of the Arcano Control Units (which are sparkling) to control a friendly Arcano-Scorp to tag 8 Greater Felfire Diemetradons. Clicking on the Arcano Control Units makes the item animate but nothing happens. There are 3 control units and clicking on all 3 of them does nothing and the quest cannot be completed.
In this quest area of Shadowmoon Valley, you're are supposed to go to the lava flows just outside the Ruins of Baa'ri and use one of the Arcano Control Units (which are sparkling) to control a friendly Arcano-Scorp to tag 8 Greater Felfire Diemetradons. Clicking on the Arcano Control Units makes the item animate but nothing happens. There are 3 control units and clicking on all 3 of them does nothing and the quest cannot be completed.