Hazardous Materials (quest)

Objectives
Stefan at Ebon Watch wants you to go to Voltarus and complete any tasks Drakuru has for you. While there, you are to steal 5 Harvested Blight Crystals. If you lose your Ensorcelled Choker, return to Stefan at Ebon Hold to get another.
 * Drakuru's task complete
 * Harvested Blight Crystal (5)

Description
Concentrated blight crystals?! What could this Drakuru be up to?

Clearly, he's working on something important. Continue to do his bidding and perhaps once he's more familiar with you he'll reveal his plans.

In the meantime, we need to have a look at these crystals.

While you're in Voltarus, try to get some samples of the harvested crystals when no one's looking.

Be alert! Handling those crystals can trigger your disguise to fail.

Rewards
You will receive:

Progress
Welcome back,.

Were you able to steal any samples of Drakuru's crystals?

Completion
Fascinating!

We'll look into the properties of these crystals right away.

Now tell me,, what is the latest with this Drakuru fellow?