I’m playing through Storm King’s Thunder, and came across an unusual magic item:
Gavel of the Venn Rune
The Gift of Truth feature for this item says:
Whenever a creature utters a lie while within the 30-foot-radius sphere, that creature takes 5 psychic damage and flinches visibly.
This is pretty cool, but it makes me wonder:
What spells or magic items are available to detect lies?