When you Hook 3 different Survivors, Hex: Scared to Death activates on a random Totem and triggers its effect:

• Basic-breaking a Pallet during a chase causes all Survivors within 13 metres to scream and gain 11/12/13 % Hindered Status Effect for 3 seconds.

The Hex Effects persist until the Hex Totem is either blessed or cleansed by a Survivor, disabling it for the remainder of the Trial.

"There was a scream from the forest. Like someone was attacking her." — Mount Ormond Missing Person Report