Fortitude

determines how likely a creature may be able to reduce or negate the effects of physical afflictions and body system attacks, like Poisoned, Diseased, Burning, Frozen, Shocked, Sickened, Stunned, Crippled, Bleeding, Blinded, Deafened and Silenced. It is contrasted by the attacker’s Accuracy and is determined by a creature’s Constitution.

Mechanics


for Human players, but can vary depending on creature type.

depends on the creature's Natural Constitution:

The chance to avoid an effect through Fortitude is:

