Whenever a Survivor performs a Healing action while they are inside your Terror Radius, that Survivor suffers from the Blindness and Exhausted Status Effects
These effects linger for 6/8/10 seconds after the Healing action is interrupted by any means.

Your Terror Radius is increased by 26percent.  Gain 100percent more Bloodpoints for action in the Deviousness category.

Any Survivor repairing a generator suffers from the Blindness and Exhausted status effect.  If the Survivor is already Exhausted, their status effects timer will be paused.

Both status effects linger for 5 seconds after stopping repairs.

After damaging a generator this perk becomes active for 60 seconds.

The generator regresses at 200percent of the normal regression speed and you can se its aura in yellow.

Each time a Survivor completes a good Skill Check on a generator affected by this perk, you receive a loud noise notification.

Performing the Damage Generator Action on a Generator activates Oppression:

Causes up to 3 additional Generators to also start regressing.
Triggers a difficult Skill Check on all Survivors currently repairing one of those Generators.
Oppression has a cool-down of 120/100/80 seconds.

Crows startled by Survivors within 20/28/36 meters alert you with a Loud Noise Notification.
Spies from the Shadows has a cool-down of 5 seconds between alerts.