The Eighth Object is of a type familiar to any Hermetic magus: it is a mirrored bowl made of pure silver, three feet across. Many magi use a similar container to study vis in a laboratory.
Inscribed on the bottom of the outside of the dish are a series of simple pictures, using a mixture of doodles, Criamon symbolism, and Verditus runes, to suggest that a magus should attempt to study vis in this bowl, and that when this fails, the user should save the residium. These instructions were considered a simple, utilitarian guide until the discovery of the Twenty-Eighth Object. The residium is succursus. The discovery of succursus fascinated and terrified magi.
The original researcher who attempted the use of the bowl, Gregorius of Bonisagus, died in 1228 when his laboratory was destroyed. Later researchers have suggested that he was surprised by the properties of the substance: either it ignored his ward, or slowly moved under its own power toward the vis stored in his lab, or embodied in his magic items. It must be assumed he thought the effects would be negligible, and so used a large amount of vis, to make whatever effect he was meant to see more obvious. This, of course, produced several pawns of succursus, which in later experiments, have completely destroyed buildings, when they neutralised, and were neutralised by, vis.
This Object was the main one used to make succursus for the Mongol Wars. House Tremere made great use of arrows coated in succursus, fired by their Cuman allies, when skirmishing with Mongol sorcerers.
Succursus was not used medicinally until the Twilight of Primus Sirocco of Jerbiton in 1312. So much succursus was used that she was, afterward, unable to cast spells, although she had, fortunately created magical items which allowed her to retain, at one remove, many of her most prized magical abilities. A Grand Tribunal did find such use of succursus a Hermetic Crime deserving death, which led, it is probably unnecessary to say, to the flight of her lover to Soqotra, and the well-known story of romance and tragedy which followed, possibly best detailed by Justinia of Merinita in Tale in Silver and Gray. The Object remained in Soqotra briefly, but was gifted to the Academy on the centenary of its foudnation.