If you wish to join cause and slaughter the black dragons in hiding, prove yourself by taking down . He's amassing an army in Gilneas.
We haven't been able to slip past his defenders, but we've got a man on the scene keeping an eye on him. Zazzo Twinklefingers, a very crafty arcane mage, is waiting for us to contact him just outside of the ruins of the Gilnean capital.
Find him and he'll direct you to the target.
Ravenholdt sent you? I hope you're a better assassin than the others.
Patches and hotfixes Edit
Patch 4.3.0 (29-Nov-2011): Added.