Received from: automatically after talking with Dethmold during Conspiracy Theory.
Step 1: Search the sight of Sabrina Glevissig's execution
In order to learn more about Sabrina's death, you have to go to the execution site (M23, 5). Approach the circle and take a look at it - you will have a couple options to choose from and look closer:
Examine the pedestal
Examine the items around the Circle: examine the candles, take the square coin - connected with Conspiracy Theory, take the letter.
Examine the soil: examine the human tracks, examine the animal tracks
Examine the wheel: degree of charring, fresh marks (you can pick up the nail relic - connected with The Blood Curse)
Notice! You will also come across two soldiers connected with Lost Lambs.
Step 2: Talk to the soldiers by the circle
Ask the soldiers in detail about what happened, whether did they see the execution and how did they end up here. You will learn of the Visionary - ask more to learn where the mysterious man lives. In the end you will be asked to return the nail, which supposedly protects the owned. You can also take the soldiers with you or leave them be.
Notice! By keeping the nail, you will be able to help a group of arguing soldiers determine whether or not the nail they have bought from the relic merchant is authentic.
Notice! In order to finish Lost Lambs, you have to agree to return with the soldiers!
Step 3: Go see the relic vendor
It's best to visit both - however the relic vendor is definitely closer, so you should start with him. He can be found in the canteen (M25, 3), sitting to the right of the tent entrance. You can ask him about the battle from 3 years ago, but the most important topic is his footsteps in the ash. Ask him thoroughly about the items he sells, Sabrina and - what's important - Yahon's spear.
Notice! There is a group of three soldiers arguing on the authenticity of a nail. If you didn't return the nail to the two soldiers at the execution site, you can verify that the relic vendor's nail is a fake.
Step 4: Talk to Visionary about Sabrina Glevissig
On your way to the cliff hut where the Visionary lives (M23, 7), you will come across a group of soldiers (M25, 16) fighting Rotfiends.
You will unlock The Path to Vision.
Once the Visionary agrees to talk with you, ask him about everything there is - Sabrina's curse, the magic mist and Yahon's spear.
Step 5: Acquire the spearhead from the relic vendor
Once again head to the canteen (M25, 3), where you will find the relic vendor - without any chit-chat, ask him for the spearhead. Unfortunately the vendor no longer has it and the information regarding its whereabouts has its price: you can pay him (or say that it's too much and choose the amount yourself) or convince him with intimidation, persuasion or Axii hex. You will learn that the spearhead has been won by a certain soldier, who's presently at Vergen.
Step 6: Talk to Dethmold about the wraiths' mist
Go to the mage's tent (M25, 7) and tell him you have to go to the other side of the mist to find the spear. You will receive the emissary flag - a sign of a peaceful mission, the Zireael armour and De Tancarville's medallion. Also don't forget to ask about the magic dust, which will come in handy with taking off the curse ad the grimoire with a marked path.
Notice! Before going to the other side, it'd be good to learn of the other artifacts, that is completing Courage Symbolized.
Notice! Before heading to Vergen, it's worth to talk with Zyvik - he will give you the Beaver cap, which will come in handy during Hatred Symbolized.
You will unlock Death Symbolized.
You will unlock Hatred Symbolized.
Step 7: Cross the mist and acquire the spearhead
Once you leave the tent and head towards the mist, you will come across Zoltan - you can grab a drink with him or ask why he's so under the weather. You will propose him to go with you to Vergen and the dwarf will ultimately agree. Leave the camp and head towards the mist (M25, 21).