The Lost Dragon Bones

Background
When you arrive in the black marshes you will come across a scattered Dragon bones, Near the Skeletal remains of a long dead dragon. Upon picking up the first bone will give you the quest. Placing the first bone into the Dragon skull will suggest that you need to find 4 more pieces of bone and they are scattered through out the marshes.

After finding all 5 bone fragments, and assembling them with the Dragon skull a Lighting storm Ensues. Destroying the mysterious barrier that was obstructed the path up the mountain path, this warrants further investigation.

Walkthrough
Start by heading left as you enter the black marshes you will find a fenced area with a Piece of a dragon bone lying on the ground next to a dragon skull. Place the Bone in the skull and it will tell you to find the remaining 4. You will basically have to complete the entire area of Black Marsh's to find all the bones. once this is done the mysterious barrier next to the dragon skull disappears head up along the Path to Fight the Spectral Dragon

The fight is pretty straight forward as you can guess electric attack's will not harm it. As your doing damage to the dragon, it will form a large electric Wisp in the center of the pattern. at this time 8 smaller Charged Wisp's will spawn and slowly head into the center of it. you need to focus your attacks on these 8 Charged wisp's and stop them before they reach the center.

If you do not stop the Wisp's they will heal the Queen of the Black Marsh (I let all 8 hit the dragon the first round and it fully healed her) My suggestion is to select all party members and hit them all One by one.

Result
The Dragon Bone is located in a Pile of rock's here, it is used for making vigilance which comes from the quest Worked to the Bone