This is the ability to control and alter your body and general metabolism. You can fight off poison and infection, increase strength and endurance, and shrug off damage. Highly skilled and powerful individuals can also regenerate and cheat death.
If you have the Alteration ability, then you gain the following unconscious bonuses regardless of your skill.
At a cost of one Exhaustion, turn one Wound into a Stun. Takes one hour, and the difficulty is Health x Alteration of 10 x current number of wounds.