This faction is the Drakkin resistance based in Sunderock. They are opposed to Dyn'Leth and give tasks towards that end.

Once you complete the Captains mission arc you can request the Kellak and Vergalid instances. These are required to obtain the Ashengate raids. In addition, obtaining ally faction will allow you to use the drake handler to teleport you to the Green, Gray, or Black Legion camps.

There are 3 ways to raise this faction. First is by killing any Green, Gray, or Black Legion npcs. The second is by turning Insignias to the Armorer. These are no drop, stackable, and come from named legion mobs. The third way is completing Captain Zheren and Scout Zyran tasks.