Umbral Arcana

Esther explains that the Gramercy Occult Society manages the Umbral Engine, which creates the Umbral Arcana UC E1·01:07:30. She says it is the spectral force that keeps New Yorkers from being aware that magical things are happening around them at all times UC E1·01:07:35.

The Umbral Arcana is the spectral force created by the Umbral Engine that keeps New Yorkers unaware of magic UC E1·01:07:35. Santa deposits his defective clones within the sphere of the Umbral Arcana so it would not raise suspicion UC E2·01:10:00. Where the dream world breaks into Astoria the Arcana is rent, with its tears connected to Pete as their puppetmaster, and it returns when the bug woman is killed UC E6·00:01:39 UC E7·00:00:00 UC E6·01:46:47. In the pub afterwards it slowly starts to seep back in, and on the monastery fire escape it fades away UC E7·00:01:53 UC E7·01:14:42. At Grand Central the Umbral Arcana whips around the kiosk as the faeries gather UC E15·00:20:12.