Monocle of Aura Comparison (3.5e Equipment)
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Monocle of Aura Comparison: This mystical lens allows its wearer to cast detect magical residue two times per day. The user may save the imprint of a mystical aura within the lens for later comparison to another spell; this can be very useful when combined with the Confirm Identity action associated with detect mystical residue. The monocle can only hold one image at a time; the user can change this image any time she examines a new aura.
Faint divination;CL 3rd; Craft Wondrous Item, detect mystical residue; Market Price: 2,160 gp