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.

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

Increases the Action speeds of other Survivors in Healing, Sabotaging, Unhooking, Cleansing, Opening, and Unlocking by 15/20/25 percent while they are within 8 metres of your location.
This effect lingers for 15 seconds when leaving Leaders range.
Survivors can only be affected by one instance of Leader at a time.

Hiding inside a Locker for 14/13/12 seconds while carrying a depleted Item will replenish its Charges to 99 percent.
Each use of Built to Last reduces this percentage by -33 percent.