Fatigue increases the costs of some talents, depending on the resource they use. Fatigue depends directly on the armour and equipment worn and is expressed as a percentage. This percentage is the amount that resource costs are increased by, with some resource types having double fatigue penalties. For example, at 21% fatigue a combat talent will cost 1.21 times as much Stamina and a spell 1.42 times as much Mana. Obviously, less is better. Although there are some ways to reduce fatigue, it cannot go below 0%. Fatigue does not affect sustain resource costs.
Resources unaffected by fatigue:
Resources with normal fatigue penalties:
Resources with double fatigue penalties: