Rationing
With this skill you will use half of an item and get its full effect. That could be with potions, poisons, food, water, arrows, and so forth. Any expendable item counts with this skill.
First Aid
This skill allows you to easily treat wounds, splint broken bones, and heal 1d6 + Medicine worth of Vitality.
Energy Trade
You can trade either Vitality, Power, or Soul with an ally for either Vitality, Power, or Soul as long as it is not the same stat. You trade at a 1 to 1 rate. Therefore you could trade 4 Power for 4 Soul and so forth.
Use Potion as Defense
Allows you to use potion as a defense action.