Deck of Dungeons
D&D 5E Loot Table Generator
D&D 5E Item List
Medallion of Thoughts
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: SRD under the Open Game License v 1.0a