From Granblue Fantasy Wiki
Hollow Soul is a silver quest treasure from Mist-Shrouded Isle.
|Buy various items from the Treasure shop||5|
|Craft Tranquilizing Powder||2|
|Upgrade Revenant Weapons (step 2)||100|
|Uncap SSR Celeste Omega Weapons to 4★||100|
- Chapter 22 Quest: For Whom the Bell Tolls - 21 AP (silver chest, 0-8 per quest, recommended with TH / drop rate summons)
- Chapter 22 Quest: Playing Cat and Mouse - 50 AP (silver chest, 4-10 per quest) - only available twice a day. Requires reaching main quest Chapter 64 to unlock.
- Chapter 23 Quest: A Soldier's Pilgrimage - 20 AP (silver chest, ~1-3 per quest)
- Drop from Normal and Hard Celeste raids (silver chest)