Collect 10 Illidari Tabards and then use the Wildhammer Flare Gun to signal another Wildhammer Gryphon Rider. Speak with Thane Yoregar at Wildhammer Stronghold in Shadowmoon Valley should you lose your Wildhammer Flare Gun and require a replacement.
The gryphon riders must return to Wildhammer Stronghold to prepare for the next phase of our assault. What I need from you now are the tabards that these blood elves wear.
When you have collected enough tabards, call for a gryphon rider using the Wildhammer flare gun. Prepare yourself for a bit of espionage, [race]!