A totem of healing, or "Sorcerer's chime", to give it its proper name, is a magical instrument. Each crystal bears an elemental sign of the Old Religion. When enchanted, the crystals resonate, their music giving succor to the ailing and the sick.
The witch and healer Alice created one and gave it to the innkeeper, who was seriously ill. The innkeeper put it in the inn's doorway and it cured him, along with Alice's magical potion.
Before the Great Purge, Alice , whose power and ability was uncanny, taught Gaius healing magic, being herself
very skilled in this Art, and about the properties of the Sorcerer's chimes (Love in the Time of Dragons).