After triggering your third Protection Hit, Mettle of Man activates:

While injured, Mettle of Man shields you from going down the next time you take damage.
Healing back to full health will reveal your Aura to the Killer whenever you are farther than 12/14/16 metres from them.
Mettle of Man deactivates the next time you are put into the Dying State.

Increases the odds of becoming the Killers initial Obsession by +100 percent.

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

Prevents Crows from being alerted by your proximity and flying off, unless they are being stepped on.
Suppresses the urge to scream from any cause at all times.
Suppresses all noises related to unlocking Chests, and cleansing or blessing Totems.
Reduces their Interaction speed by 40/35/30 percent.

Unlocks potential in your Aura-reading ability.
The Auras of Breakable Walls, Pallets, and Windows are revealed to you within 24/28/32 metres.

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.

After performing a Safe Hook Rescue on another Survivor, Deliverance activates:
Causes your next Self-Unhook attempt to always succeed.
Causes the Broken Status Effect for 100/80/60 seconds after unhooking yourself.
Deliverance is not available during the second Hook Stage or if you are hooked as the last living Survivor in the Trial, regardless of your Hook Stage then.

Unlocks potential in your Aura-reading ability:
Paranoia paired with your horror of failure helps prepare you from repeating the same mistakes.

The Auras of the 3 Generators in closest proximity to one another are revealed to you for 30/45/60 seconds at the start of the Trial, and each time a Generator is completed.
Increases your Repair speed on those Generators by +5 percent while active.
If you are holding a Map, all Generators revealed by Déjà Vu are automatically added to it.