Aura Lenses

A set of these large glass lenses are contained in a single cylindrical case. Each is four inches across, tinted different hues, and associated with a particular school of magic, as shown on the following table. When you hold a lens up to your eye and look through it, the world appears to be tinted in the appropriate color, except for creatures and objects which are under the effect of a spell from the lens's associated school of magic, which are not colored at all.

A complete set of aura lenses contains all 8 individual lenses, but most are found as an incomplete set, containing only 1d8 of them