A Night in the Lonesome October - Egypt 1925
There are 2 key factors that are used in resolving your actions.
If you are in a contest with another character, the character with the highest stat succeeds. The amount by which they succeed will give them Leverage (see below). Leverage is only relevant when directly contesting another PC.
When you win a contest, you generate Leverage. Leverage can be added to by Traits.
Mr Smith has Spirit 2 and engages Mr Bloggs in a psychic duel. Mr Bloggs also has Spirit 2. Neither character wins – the contest is a draw.
If Mr Smith had a Trait that gave him extra Leverage in a psychic duel, he would win but only gain the Leverage of the Trait (for example if he had a focussing crystal that gives +1 Leverage in psychic duels, he would get Leverage 1).
If Mr Smith had Spirit 3, he would win and as the stat difference is 1, he would get Leverage 1. Additional Leverage from Traits would add on to this.
Leverage determines how much you win by and how effective your result is. In the case of a psychic duel or any other action designed to directly reduce an opponents Power, it acts as a multiplier as per the table below.
If you successfully defend against an attack, your Power is spent.
If your Familiar dies, you lose all the power in your Familiar defensive Pool as well as 3/4 of your current Power.