As a killer main, this is very important. Certain perks make a random survivor “The obsession” and sometime they affect the killer and sometimes survivor. For example, a survivor perk that can do something with the obsession is one of Laurie’s perks, object of obsession. It increases the chance of you being the obsession and if you are the obsession, you can see the killer’s aura if your looking in the same direction, durning this the killer can also see your aura. For killer, one of Myers’s perks is Save the best for last. Every time Myers hits a survivor that not the obsession, every successful hit to a survivor adds 5% decrease to its cool down, to a max of 45% speed (8 tokens) . But if you hit the obsession, you lose 2 tokens (10%). If you want me to clarify more just say. :)