Anniki's Mindful Messenger

Picturing a creature you are familiar with, you force them to make a Wisdom Save (your save DC).  On a failed save, you momentarily inhabit their mind and deliver a message to their surroundings of up to 25 words.  The message appears to those around them as their own words, unless someone makes a contested Insight Check to your Deception.  They are left unaware that anything has happened at all once the spell is complete.  

To cast the spell, the caster must speak the message aloud.

On a successful save, the spell does not take affect and the target knows someone was trying to pierce their mind.