Hollow Soul



 is a silver quest treasure from Mist-Shrouded Isle.

Obtain

 * Chapter 22 Free Quest: For Whom the Bell Tolls - 21 AP (silver chest, ~2 per quest)
 * Chapter 23 Free Quest: A Soldier's Pilgrimage - 20 AP (silver chest, ~2 per quest)
 * Drop from Normal and Hard Celeste raids (silver chest)