Who Goes There?

5th-level conjuration

Casting Time: 10 minutes
Range: 60 feet
Components: V, S, M (a flour sifter)
Duration: Concentration, up to 10 minutes

You sift the surrounding air for sound wave remnants of recent conversations to discern passwords or other important information gleaned from a conversation, such as by guards on a picket line.

The spell creates a cloud of words in the caster’s mind, assigning relevance to them. Selecting the correct word or phrase is not foolproof, but you can make an educated guess.

You make a Wisdom (Perception) check against the target person’s Wisdom score (DC 10, if not specified) to successfully pick the key word or phrase.