The sacrificial bonfire is used in the Test of the Vigil to sacrifice items to the Gods in exchange for Vigil points.
When first built, the bonfire is not lit - the Vigil will not begin until the bonfire is ignited.
Once ignited, the bonfire will report requests from the Gods for sacrifices along with the time you have to satisfy the request. Sacrifice requests begin slowly and increase in frequency over time.
When the vigil is complete (a sacrifice is not made in time), the bonfire will disappear.
Built: in a small construction site (must be built near a common altar)
Skill/Tech required: must be signed up for the Test of the Vigil (University of Worship)