Prophecy of the Corpse Star

You whisper fragments of prophecy seen in the blank face of the Corpse Star. 

As an Action, you force one creature you can see within 60 ft. to make a Wisdom Saving Throw. On a failure, the creature is Deafened and Stunned for 1 Minute. The creature may repeat the Saving Throw at the end of each of its turns, ending the conditions on a Successful Save. You may activate this ability a number of times equal to your Proficiency Modifier.  

Wisdom Save DC = 10 + 1/2 Your Warlock Level. (Rounded Down)