Medallion of Thoughts
Wondrous itemuncommonrequires attunement
The medallion has 3 charges. While wearing it, you can use an action and expend 1 charge to cast the _detect thoughts_ spell (save DC 13) from it. The medallion regains 1d3 expended charges daily at dawn.
Source: 5e Core Rules · OGL-1.0a · 5.1