After being unhooked or unhooking yourself, Decisive Strike activates for the next 40/50/60 seconds:

When being grabbed or picked up by the Killer, succeed a Skill Check to automatically escape their grasp, stunning them for 3 seconds.
Successfully stunning the Killer will disable Decisive Strike for the remainder of the Trial and result in you becoming the Obsession.
While Decisive Strike is active, performing Conspicuous Actions will deactivate it for the remainder of the Trial.

Decisive Strike deactivates once the Exit Gates are powered.

Increases the odds of becoming the Killer's initial Obsession by +100 percent.
The Killer can only be obsessed with Survivor at a time.

After repairing Generators for a total of 33 percent, Wiretap activates:

After repairing a Generator for 3 seconds, press the Active Ability button to install a Wiretap, which stays active for 60/70/80 seconds.
The Auras of trapped Generators are revealed to all Survivors in yellow.
When the Killer comes within 14 metres of a trapped Generator, their Aura is revealed to all Survivors.
Damaging the Generator destroys the Wiretap.

You cleanse Totems 20 percent faster.

Gain another, stack-able 20 percent Cleansing Speed bonus per cleansed Totem.
After cleansing a Totem, the Aura of the Totem farthest from you is revealed to you for 2/3/4 seconds.

When injured, healing another Survivor without using a Med-Kit also heals you with a Conversion rate of 40/45/50 percent.

Unlocks potential in your Aura-reading ability:
The Auras of closed Chests and dropped Items in the environment within 16/24/32 metres of your location are revealed to you.
Grants a considerably better chance at finding an Item of a higher Rarity from Chests.

Grants 3 additional Self-Unhook attempts.
Increases the Self-Unhook chance by 2/3/4 percent.