If you start your turn below half health, you must succeed on a Wisdom saving throw or enter a state of bloodlust, where you must use your action to attack the nearest creature.
Usually saved for boss encounters or massive "trash pulls." Timing is critical; players should coordinate with the group to ensure cooldowns are available for maximum damage during this window. Blood Lust
It was verified by the player Knobbelboy on February 20, 2018, after 121,296 attempts. If you start your turn below half health,
Survivors can reset a Killer’s bloodlust by breaking line of sight, stunning the Killer with a pallet, or forcing the Killer to perform an action like breaking a pallet. stunning the Killer with a pallet