Ring of Dark Glass

Ring, Rare

“For now we see as though a glass, darkly.”
-1 Corinthians 13:12

This ring appears to have been hewn from a black, glass-like substance. While wearing it, you are innately aware of the presence of celestials and fiends, as though by the detect evil and good spell. As an action, you can open a window to peer into another Realm of existence, allowing you to see the activity and influences of celestials and fiends in the Veil.

The window is 8 feet wide and tall. Opening this window only allows you to see and hear creatures in the Veil, as though through a pane of dark glass; creatures and objects are not able to pass through the window from either side, and you cannot casts spell through it. You can close the window with a bonus action.

Azrael's Guide to the Apocalypse, printed page 173.