Shadowvapor

Shadowvapor is similar to potential, but it's a simpler version. Shadowvapor is a Shade's ability to see if they can trust you. Shadowvapor is a blocking for one's secrets, and illumination is the opposite. According to Tam and Linh Song, the two cancel each other out. When a Shade reads someone's Shadowvapor, it feels like a blizzard blasting through their head. To read Shadowvapor, a Shade will move their shadow over the person, similarly to Shadow-whispering, and perform a reading.