Pure Reiki Healing - CRYSTAL GRIDS - Amazing Secret Discovered by Middle-Aged Construction Worker Releases Healing Energy Through The Palm of His Hands. Cures Diseases and Ailments Just By Touching Them. And Even Heals People Over Vast Distances.
Candle light wards might also be another thing. I can see Tsava Leko having wards based on candles around their caravan. Though I think his own wards where originally dolls that he used to focus elemental powers into.
Crystal grids supercharge the effects of a certain stone's properties, or the collection of stones used in the pattern created. When crystals come together, their energies change and heighten, creating some serious amplification and healing.