Fatigue and Hunger

Fatigue and Hunger
Whenever a Game Master (GM)) feels that a character is at risk of Fatigue or Hunger, such as after not eating for a day or sleeping in the rain on cold stone, they can ask for an check. If the player fails this roll they gain a point of Fatigue. Every point reduces the player's maximum  by 1 until they remove the Fatigue or Hunger. If this reduces their  to zero, they cannot use Skill Gems, and they lose 25% maximum  per additional Fatigue or Hunger point. If this reduces them to zero, they die, go insane, or worse... depending on how evil your GM is. Certain conditions or effects might grant more than one point of fatigue.

Optional rule: Path of Tears
If you wish to make the game gritter and far more difficult, you can rule that whenever a player has their exceeded by an attack they gain a point of fatigue. This will make players unable to deal with many combats, and place a much stronger emphasis on resting regularly and comfortably.