Vigil

For the duration, you can see the presence of ghosts and lingering spirits on the Ethereal Plane, regardless of whether they have manifested on the physical plane. While you cannot see all the way into the ethereal, you can see dead spirits with enough detail that you can make out distinctions between them and even notice identifying features with successful skill checks (Investigation, Perception, Insight, or History checks, difficulty set by DM as appropriate)