The Blackwood Company are in competition with the Fighters Guild, but are much less scrupulous and will accept any job. As you advance in the Fighters Guild, you will collide with them more and more often. They are based in Leyawiin and their headquarters are directly across from the Fighter's Guild Hall. The Blackwood Company members use the intoxicating sap from the Hist Tree to boost their combat prowess. When consumed by a non-Argonian, Hist Sap exhibits hallucinatory properties. The Hist Tree that the Blackwood Company uses was smuggled directly from Black Marsh, is located in the basement, and is a well-guarded secret. Gallons of the tree's sap are drained daily to fuel its members.
