[Killer] The Crow
A killer idea about a crow-human killer that can fly around the map (I don't know how exactly this can work, but need to be balanced), also, passively: Spies from the Shadow it's now a passive for this killer and he will have some perks like this:
King's guardians: If a survivor continious keep doing an action for 16/14/12 seconds, a crow will notify the killer the ubication of the survivor.
Servants of the darkness: While you're in chase, a group of crows will block a pallet next to you, making it unable to be dropped (this perk has a 60/50/40 seconds cooldown).
Rite of the experiment: While you're in chase, your field of view will be reduced moderately/moderately/slighty and your lunge attack range increases +/10/15/25%, while you're not in chase, your field of view will increases slighty/slighty/moderately and your terror radius increases 4/6/8 meters.