Infiltration (Oblivion)

Go to Blackwood Company in Leyawiin (right across the street from the Fighter's Guild), talk to the main guy, and follow him to the basement. He will give you Hist Sap. Drink it and you will be "magically teleported" to the Water's Edge. Kill all the goblins and then you will black out. You will then wake up in Chorrol. Head back to the Water's Edge to talk to the last remaining survivor to complete the mission.