Unlocks potential in your Aura-reading ability:
For the duration of the Killer carrying another Survivor, you see the Aura of every Hook within 56 metres of the pick-up location:

The Auras of regular Hooks are revealed to you in white.
The Auras of Scourge Hooks are revealed to you in yellow.
Unlocks the ability to sabotage Hooks without needing a Toolbox.

Sabotaging a Hook without a Toolbox takes 2.5 seconds.
The Sabotage action has a cool-down of 90/75/60 seconds.

Each time a Survivor other than yourself is killed or sacrificed, Sole Survivor gains 1 Token, up to a maximum of 3 Tokens:

Each Token grants a stack-able radius of 20/22/24 metres within which the Killer is unable to read your Aura, up to a maximum of 60/66/72 metres.
Once you are the last Survivor standing, you benefit from the following effects:

Increases your Repair speed of Generators by +75 percent.
Increases your Opening speed of the Exit Gates and the Hatch by +50 percent.
Increases the odds of becoming the Killers initial Obsession by +100 percent.

The Killer can only be obsessed with Survivor at a time.

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.

Upon completing a Healing action on another Survivor, they benefit from the following effect until the next time they take damage:

Increases their Action speeds in Healing, Unlocking, Cleansing, and Blessing by 12/14/16 percent.