pf2e.fyi
From Pathfinder Lost Omens Hellfire Dispatches, which isn't enabled.

Seek Injustice

FEAT 0
CONCENTRATEMAGICALREVELATION
Activity 3 actions
Archetype Hellknight
Prerequisites Order of the Scourge
Frequency once per day

With a moment spent focusing, you can locate the telltale signs of corruption no matter what means it may use to hide from your sight. For 1 minute, you can see through up to 5 feet of stone, wood, or similar barriers as if they didn't exist (though any amount of metal or denser barriers block this effect).

Pathfinder Lost Omens Hellfire DispatchesORC