Bloodwell Vial

A bloodwell vial is a vial of blood that can be used as a spellcasting focus and buff for sorcerers.

Description
The bloodwell vial from the Trove of Marwa is a small glass vial with blood in it. In order to attune to it, the sorcerer using it must add a few drops of their own blood to the vial, and then cannot open it while the attunement lasts. When attuned, the sorcerer gains a bonus to their spell attack rolls and saving throw DCs for their sorcerer spells, with rarer vials granting higher bonuses. Additionally, when the sorcerer regains HP via hit dice while attuned, they can also regain 5 sorcery points. This can be done once per day.

Exandria Unlimited
Dariax Zaveon found and purchased a bloodwell vial in Gilmore's Glorious Goods.

Campaign 3: Bells Hells
Marwa Endalia had a +1 vial in her shop that she had obtained from a witch who lived in the jungles of the Oderan Wilds. She mentioned it when the soon-to-be-named Bells Hells first came into the Trove of Marwa but was unable to find it, and told them she'd clean up the shop and they could come back later. Laudna returned in a few days and purchased the vial.

After Laudna's death, Imogen took and temporarily attuned to the vial. After Laudna was successfully resurrected, Imogen tried to return it, but Laudna suggested that Imogen would get more use out of it than she would, and told her to keep it.