When you are the last Survivor remaining in the Trial, the Aura of the Hatch is revealed to you when you are within 24/28/32 metres.

You start the Trial with 1/2/3 Token(s) and gain a Token each time you succeed at a Great Skill Check, up to a maximum of 5 Tokens.

Each time another Survivor cooperating with you fails a Skill Check, Corrective Action consumes 1 Token, transforming their Failed Skill Check into Good Skill Check instead.
Corrective Action only applies to normal Skill Checks.

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.

Increases your Crouching Movement speed by 90/95/100 percent.