You start the trial with 3 Tokens.
Whenever the Killer attempts to read your Aura, Distortion activates and 1 Token is consumed:

Your Aura will not be shown to the Killer and you will not leave any Scratch Marks for the next 6/8/10 seconds.
Every 30 seconds you are within the Killer's Terror Radius, Distortion gains back 1 Token.

Distortion does not activate when you are in the Dying State.

Distortion cannot accumulate more Tokens than its initial count.

Reduces the volume of Grunts of Pain while in the Injured State by 25/50/75 percent.
Iron Will cannot be used when suffering from Exhaustion, but does not cause the Exhausted Status Effect.

Unlocks potential in your Aura-reading ability:
The Auras of Survivors in the Injured State or in the Dying State within 64/96/128 metres of your location are revealed to you.
Empathy does not reveal the Aura of a Survivor being carried by the Killer.

Receive an auditory warning upon looking in the Killers direction within a 45 ° cone within 36 metres.
Premonition has a cool-down of 60/45/30 seconds each time it activates.