As two actions, a creature that you can touch or see within 18 meters must make a Will saving throw. It automatically succeeds if it doesn’t share a language with you or if it can’t hear you.
On a failed save, you magically whisper a phrase that only the creature can hear as it is charmed by you for the duration or until you or your allies attack it, damage it, or force it to make a saving throw. It interprets the whispers as a description of its most mortifying secret. You gain no knowledge of this secret, but the target is convinced you know it.
On a successful saving throw, your whisper sounds like unintelligible mumbling and has no effect.
The charmed creature obeys your commands for fear that you will reveal its secret. It won’t risk its life for you or fight for you, unless it was already inclined to do so. It grants you favors and gifts it would offer to a close friend.
When the effect ends, the creature has no understanding of why it held you in such fear.