Sersa’s Guardian ("Maestro's Power", Bloodwell Vial +3)

Very Rare

This crystal vial is filled with bright red liquid and can't be opened while your attunement to it lasts. You can use the vial as a spellcasting focus for your spells while wearing or holding it, and you gain a +3 bonus to spell attack rolls and to the saving throw DCs of your sorcerer spells. In addition, when you roll any Hit Dice to recover hit points while you are carrying the vial, you can regain 5 sorcery points. This property of the vial can't be used again until the next dawn. Owning this vial grants you a tiny portion of control as a guardian of Sersa. The level of the red liquid inside indicates if all is well with Maestro’s guardianship.

Manual of Quickness of Action

Very Rare

Source: CCC-BMG-37-HULB-3-1 Weakness of Rock