d647950c_d___Game_Guide_and_Walkthrough__BONE_CHARM_PROPERTY
[BONE CHARM NAME] Spiritual Pool [USEFULNESS] Quite useful a charm, especially if you use powers frequently . [BONE CHARM PROPERTY] 
Faster mana regeneration.
Bone Charms - list - Collectibles - Dishonored - Game Guide and Walkthrough
BONE CHARM PROPERTY