I've made it my business to learn as much as possible about the vile death cult, including their secret language.
Vurenn was right. The cultists mention disguised operatives in Valiance Keep: the lower docks, the jail inside the inner hold and in the inn's kitchen.
Take the oculus. Use it at those three locations — anyone that has recently used the cult's necromancy will be enshrouded by a dark aura. Take care of the cultists before something nefarious happens.
Have you accomplished the task I asked of you, <name>?
You've done well, <name>. However, I can't shake the feeling that this is not the last we've seen of those death cultists.
Darkness has a way of hiding even in plain sight.
"Salty" John Thorpe is in the kitchen, Tom Hegger is on the dock, and Guard Mitchells is in the jail. Mitchells has two or three guards standing next to him, you might want to pull him away from them, if they kill him it won't count (as usual).