Nameless Terror

Overview
The Arisen becomes a marked target for assassins (who are ironically named). You must seek out their ambushes at night and vanquish your would-be killers.

Details
The quest becomes available after Seeking Salvation (if you didn't kill the cultist) and after Come to Court (if you did kill the cultist).

When leaving the Southern gate of Gran Soren, talk to Ser Rickart, and he hands you a letter which initiates the quest to hunt down and kill the assassins.

Walkthrough
There are five groups of assassins to seek out on the roads between 8PM and 4AM. (You'll know you have the right battle because they'll talk to you and introduce themselves). Do not confuse these with random encounters with nameless Salvation folk.
 * By Gran Soren's northern bridge, just north of the Catacombs Rear Passage 2 and the Storage Shed, right before the path forks east and west. Be wary of a massive skeleton attack at the same time. (Phantom, Ghost, Soul, Spirits)
 * Just outside the Ancient Quarry North Entrance (Raven, Hawk and Condor)
 * At the loop in the road just past the half-way gate-point between Gran Soren and the Mountain Waycastle, near a harpy hill (not the one with the cage). It is just north of the Mountain Cottage (Darkness)
 * At the loop in the road half-way between the Encampment and the Mountain Waycastle, just north of the Abandoned Storehouse (Rogue, Noir)
 * Once you have killed all the others, you will get a Quest Update. After that, head to just outside the gate to Cassardis where the leader will spawn (Zero).

Rewards
30,000 Gold, 12,000 Experience, and a Tightly-Folded Letter