Bloodmoon:Razing the Forest

Quick Walkthrough
#Speak to Falco/Carnius about your next assignment to hear about the Spriggans that are attacking the town.
#Find and kill the four Spriggans near the colony.
#Speak to Unel Lloran once the four are dead.
#Search the mine looking for tree roots. Speak to the miners for some information.
#Return to Unel with the information. Escort Unel to see the roots.
#Find five bittergreen petals and bring them back to Unel.
#Return to Falco/Carnius to receive your reward.

Detailed Walkthrough
Falco or Carnius
Speak to Falco/Carnius about your next assignment to be told about the recent attacks by Spriggans, apparently concentrated on the East of Raven Rock near a cluster of trees. Falco/Carnius wants you to investigate and clear up the matter and report back to Unel Lloran in the bar.

 
thumb|right|One of the four Spriggans
Spriggans
The directions Falco/Carnius gave you for the Spriggans are quite misleading, as the four Spriggans you have to kill will actually spawn inside the colony. Two are at the back of a building just southeast from Falco. Another can be found among the new construction on the east end of town. The last one is located at the back of the round building beside the tavern. Kill all four Spriggans three times each. There will be a journal entry when you are finished.

Unel Lloran
Once the four Spriggans are taken care of, you can visit Unel in the bar (he'll dismiss you if you talk to him before the four are dead). He'll say that although you've taken care of the Spriggans, the trees still cannot be cut down, mumbling something or other about finding the roots. He suggests checking around in the mine to see if you can find the roots or anything else down there.

The Mine
Speak to anyone in the mine about roots to learn that, indeed, they encountered some nasty roots in the mine off of the northern passage. Explore the mine until you find a door to the Abandoned Mine Shaft. Enter and shortly inside you'll receive a journal entry telling you to inform Unel about what you've found.

Return to Unel
When you return to tell Unel of what you found about the roots, he'll want you to escort him down to the mine to see for himself. Once you've escorted him to the roots, an uneventful trip, he'll ask you to get him five Bittergreen Petals with which to poison the roots' water. He also mentions that the petals are unlikely to be found on Solstheim (which appears to be true). The quickest route might be to cast a Mark spell here, then Almsivi Intervention over to Gnisis. Just inside the Temple you'll find Zanmulk Sammalamus, who sells an infinite supply of Bittergreen Petals. If you don't use spells, you can also go to him by boat from Raven Rock to Fort Frostmoth, then to Khuul and then taking the Silt Strider to Gnisis. Once you have them, return and give them to Unel. He will thank you and tell you to go visit Falco/Carnius and tell him the news.

Return to Falco/Carnius
Return to Falco/Carnius with the news about the roots and receive a gold reward (2000 from Falco or 1000 from Carnius).

Bugs
 
 This can be fixed by spawning them manually via the Console.
One non-Console strategy is to head southeast from Falco's location, just past the dock, until a Spriggan is encountered. She may be around Koljborn Barrow. After killing that Spriggan three times, head to the rock formation on the southeast part of town (map link). A second Spriggan should now spawn here if you keep walking around. You should save the game immediately when it is sighted. After killing this Spriggan once, one more will spawn at the rock formation, so you will fight two at once if you haven't drawn out the first one. After killing either Spriggan one more time, another will spawn immediately behind the Raven Rock Bar. If you're not careful, all three will be attacking you at the same time; you can avoid the wrath of all three Spriggans by drawing them out towards the water one at a time.
A less programatic approach is to simply wander the environs of the colony and fight every encountered Spriggan (whether you think it quest-generated or not – they are visually indistinguishable), killing each three times in turn, and returning to the colony center between fights. Don't do Dispose of Corpse on them; you don't want any regular Spriggans to confusingly respawn if you are taking your time and transition from one cell to another. At some point, no Spriggans will be left anywhere near the colony. You can stop when you get a journal entry indicating that the job is done. (You can then remove the corpses if you want the regular Spriggans to respawn faster for their triple soul-trapping potential.)
 
 This can be fixed by entering the Console command   after killing all the Spriggans.
 

Quest Stages