A torus is essentially a donut-shaped form, which in The Fifth Season is used to describe the area around an orogene when they use their orogeny—the orogene is in the center of the donut, and the torus forms around them. Within the torus’s limits the orogene draws power from the “ambient,” meaning anything alive or containing energy. This also means that everything within the torus is “iced” as the orogene drains it of its kinetic energy, meaning instant death for any living thing. Skilled orogenes can control their tori and even send them outside of themselves, as when Alabaster creates a brief torus to break open the gates of the node station.
Torus Term Timeline in The Fifth Season
The timeline below shows where the term Torus appears in The Fifth Season. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 8: Syenite on the highroad
Chapter 19: Syenite on the lookout
Chapter 20: Syenite, stretched and snapped back
Chapter 22: Syenite, fractured
...high on the clifftop, using both the obelisk’s power and the life within the icy torus surrounding him. Syenite worries about him, remembering his emotional breakdowns of the past, and she... (full context)