This quest and several others in the area may only be available after completing several other quests:
Search Stillpine Hold for clues.
Quest Text Edit
As High Chief, my immediate concern is the root of the corruption in Stillpine Hold.
Why did the wildkin - once our allies - attack us? Why have they taken residence in Stillpine Hold?
Perhaps something inside will hold the answer. Search Stillpine Hold for clues as to the source of corruption.
The blood crystal radiates a sickly aura that seeps into the water of the cave.
- 625 XP
The Blood Crystal is at the very back of the cave. Take the left-hand route when the tunnel branches. Coordinates are: 50,11
If you are also completing at the same time, you may find it easier to take the right-hand branch, use the bridge to cross back over to the West side, kill the chief (and any additional needed wildkin), then drop down to the crystal from above.
Two wildkin spawn after you inspect the crystal (completing the quest).