An unnatural tingle warns you of impending doom.

Whenever the Killer is within 36 metres of your location, Spine Chill activates, lighting up its icon. If there is a Terror Radius present, Spine Chill will reveal its intensity using its icon.

If the Killer is within range and looking at you with a clear line of sight, you benefit from the following effect:

Increases your Action speeds in Repairing, Healing, Sabotaging, Unhooking, Cleansing, Blessing, Opening, and Unlocking by 2/4/6 %.This effect lingers for 0.5 seconds.
"There is a voice that doesn't use words. Listen.." — Sassy, The Lost Tapes

Pacifist belongs to  Dev the World Builder

Note: This is not the original icon. I made my own version of it to reflect the point of the perk. The terror radius being a heartbeat.