Dark Reign - Clearing The Path
This task requires you to kill 8 Stillmoon Drakes in Stillmoon Temple. To reach this zone you'll want to go north out of Lavastorm to The Broodlands. Then once you're in The Broodlands continue north to Stillmoon Temple. When you first arrive you'll see a ton of Drakes around, you'll probably be like 'well this is easy, just gotta kill 8!' You'd be wrong.
The drakes you need have to be called Stillmoon Drake. You should be a pretty high level character which means you can usually pull half the zone and kill it all making this task and most of them in DoN easy as pie.