With this Ability your Character may alter the way their own body behaves, down to the cellular level — it can change everything from heart rate to organ function to musculature.
Activating this Ability costs a Secondary Action and 1 point of Mind. It may be used in or out of an Encounter.
The Character may add one die to any roll involving a chosen Physical or Mental Stat for that Round (Strength, Agility, Endurance, Intelligence, Perception, Wisdom). This doesn't change their Stat nor does it affect Derived Stats, it simply adds one die to their Pool for that roll.
In addition, your Character can use this Ability to modify their physiology. There are a wide variety of uses for this but here are a few examples:
Other effects as determined or approved by the Story Guide.
Your Character can only use River’s Flow for one effect at a time. If a Character is unable to focus or is otherwise distracted as determined by the Story Guide, they must make a Will Check to Activate this Ability.