pf2e.fyi
From Pathfinder War of Immortals, which isn't enabled.

Ears That Hear the Truth

FEAT 2

You have an acute understanding of the rhythms of living things, and you never miss the quaver that betrays a spoken lie. When you attempt to Sense Motive, or when you roll Perception for initiative, you can spend a Mythic Point to attempt the check or roll at mythic proficiency.

Pathfinder War of ImmortalsORC