The Last Spriggan [Quest]

Text of the Quest:

The Last Spriggan The Reachmen at Jackdaw Cove are corrupting the spriggans and transforming them into monstrous lurchers. Only one spriggan remains in the area, and Wyress Shannia says she is poisoned and will transform into a lurcher if something isnt done.

Tasks

Wyress Shannia: Of all the travesties against nature, this is the most foul. This is the last one, the last spriggan. There used to be hundreds in Jackdaw Cove, frolicking about in the grass and the water. They were beautiful.
Hero: Did the Reachmen kill them all?
Wyress Shannia: Worse. They poisoned them, corrupted them, turned them into monstrosities—those lurchers. This is the only spriggan left, and the Reachmen's poison already courses through her branches. She will soon transform unless I am able to treat her.
Hero: Is there some way I can help?
Wyress Shannia: My sisters would not want me to trust an outsider, but they are not here, and I cannot leave her side. Frankly, I am surprised you share my concerns. You are sure you wish to help me?
Hero: Yes. Just tell me what you need.
Wyress Shannia: I need heartwood. From inside the lurchers. It's the only thing that will help the little spriggan at this point. I hesitate to ask more of an outsider, but we could do more than just ease her passing.
Hero: What more can we do?
Wyress Shannia: There is a chance we can save her life. It will require more work though. The heartwood degrades quickly in the lurchers, but sometimes remains pure. If you take the extra time to find the pure heartwood, it could save the spriggan.
Hero: I'll do whatever it takes to save her life.
Wyress Shannia: We shouldn't get our hopes up too much, but with the pure heartwood, there is at least a chance our little friend can be healed. Have you been able to find any?
Hero: Yes. I have the pure heartwood.
Wyress Shannia: Quickly then! Let me mix it into a poultice. I am grateful that you were able to find the pure heartwood.
Hero: You really think this will save the spriggan?
Wyress Shannia: I hope so. Here. Take the poultice and apply it to the poor thing. I must be prepared to do ... whatever is necessary. I pray to all the gods to bless our efforts and bring it back. The forest would never be the same without spriggans.
Hero: All right.

Wyress Shannia: Thank you. Now, with nature's blessing, our little friend will survive the Reachmen invasion. But as for her sisters ... the only thing left is to avenge them.
Hero: How do we avenge them?
Wyress Shannia: The abominations are created just across the water. A witchman has built a transformation altar there to perform his foul work. I am not equipped for this task. Will you go destroy the altar and kill the witchman for me? For the spriggans who died?
Hero: Yes. I will avenge them.

Wyress Shannia: Did you destroy the altar and kill that bastard witchman?
Hero: Yes. The spriggans are avenged.
Wyress Shannia: Thank you. I intend to take great care of this last little spriggan. With Hircine's blessing, I hope she might be the seed to spawn many more, and that someday, a multitude of spriggans will again frolick in the waters of Jackdaw Cove.
Hero: Complete Quest.