Guild Wars 2 – Disciples of the Dragon

Travel to the Outcast's Celft's Waypoint. Head just a bit South from there to find the entrance to the instance to begin this part of of your story. Once inside the instance head over to Eir Stegalkin and talk with her to begin the mission proper.

Eir Stegalkin: The Sons of Svanir are close by. We can try talking to them, but they hate anyone who doesn't serve their dragon … and they utterly despise women.
Hero: Maybe Garm should take the lead.
Eir: Bad idea. Garms leads with his teeth.
Son of Svanir: Well, well, look brothers! A stranger, a woman and a mangy dog. It's like the beginning of a bad joke.
Eir: We're hear about the jotun worshipping the ice dragon near Grawlenfjord.
Son of Svanir: Go back to carving stones, Stegalkin. And take your dogs with you.
Hero: Seems you boys didn't understand the lady. I'll say it slower: tell us about the joptuns and the draon.
Son of Svanir: You should have left when you had the chance. Now you die.

Throughout the cave and at its entrance you will find Ice Beer Kegs. Break these to get planks. These have a 50% chance of breaking with each attack but they deal massive amounts of damage.

Time for the first wave of the assault to begin. They are mostly level 5 so at max level for this quest they will fall very easily. Just engage them however they are weakest and keep the pressure on until the first wave falls. After that a second wave of 5 Sons will come you and Eir. Defeat them and they will hole up in the nearby cave. Eir recognizes this fact and has you press forward into the cave itself.

Just inside the cave entrance you will find 4 more Sons of Svanir, in 2 groups of 2. The first are a pair of Zealots and the second is comprised of an archer and an Elementalist. Defeat them and head deeper in. There is another pair of foes waiting around the corner. This final pair is Herjarr (level 4) and a pair of Icebrood Wolves (level 3).

Once Herjarr goes down you can talk with him to finish out this mission.
Hero: “Start talking. Tell us how you converted the jotun, or we'll whip you through the streets of Hoelbrak with a lash made of Eir's braids.
Herjarr: “You wouldn't dare! I'd be slaughtered by my own comrades!
Eir Stegalkin: “Then tell what we want to know.”
Herjarr: “All right! We converted the Giant-King, Korag. He converted his followers in Osenfold Shear.”
Eir: “This Korag sounds ambitions. The jotun have't had a Giant-King for centuries – the last thing Hoelbrak needs is one that worships Jormag.”
Hero: “Drag this fool to Hoelbrak and give him to the Wolfborn. I'll head for Osenfold Shear and have a word with Korag the “Giant-King.”
Eir: “Wolf's shaggy hide, you're a bold one! Be careful. There's glory in fighting impossible odds, but it's hard to brag when you're dead.”
Hero: “Don't worry, we'll share a drink to victory in the Great Lodge when I return.
Eir: “Good hunting Slayer. Jotun may be bigger, but you're badder.”