Torches and Lantern Pools
When your character is crawling through caverns, dungeons, and other lightless reaches, they will need a steady source of light to find their way and stay alert. Without one, they will find themselves in precarious Positions.
Torches and oil flasks are consumable Items, and their quantity is tracked using Pools. A single light source is usually enough for a group moving together. When your character ignites a new light, roll the Pool of the matching consumable Item and shrink it as normal.
To track how long the light lasts, use a duration Pool: 4D for torches, 6D for lanterns. Every 20 minutes of real time, roll that Pool. After each roll, shrink the Pool by 1 for every Miss, up to a maximum loss of 2. When the Pool is emptied, the light goes out and a new one must be lit.
If the 20m timer feels too intense during your sessions, do not use it. Instead, roll the Pool from time to time as your character delves deeper into the darkness.