Sorcerous Spyglass
Wondrous Item, unknown (magic)
This elegant brass spyglass features an intricate lens mechanism. A creature looking through the sorcerous spyglass has advantage on Wisdom (Perception) checks to detect things that can be seen. In addition, the user can view magical auras while looking through the spyglass, as if under the effect of a detect magic spell.
Source: X Marks the Spot p. 19