Executioner's Cap
This fungus is black in hue, dark in purpose and shaped like the head-covering of it's namesake.
Originally appeared in Ultima VIII: Pagan as a Necromancy reagent, it was to have been used in Ultima Online as a reagent for the (originally canceled) Necromancy system. It can still be found on some Whipping Vines. It can be stacked and weighes one stone each.