Tenser's Eye

You gain the ability of Truesight as long as this set of eyes replaces your original set.

A creature with truesight can, out to a specific range, see in normal and magical darkness, see invisible creatures and objects, automatically detect visual illusions and succeed on saving throws against them, and perceive the original form of a shapechanger or a creature that is transformed by magic. Furthermore, the monster can see into the Ethereal Plane within the same range.

Tenser was a notable wizard who made his mark upon the Realms, alongside Bigby, Elminster, the Simbul, Mordenkainen, and Khelben. Two of his spells were widely used across Faerûn and beyond: Tenser's transformation, and Tenser's floating disk.