Teardrops

Teardrops (commonly known as "drops") are concentrated pieces of mana used as medicine on Ravnica.Cory J. Herndon (2005). Ravnica Cycle, Book I: Ravnica, Wizards of the Coast 
Applying one to a wound causes it to heal quickly as the mana dilutes. They are used primarily for quick cures, as they can be dangerous with use over the course of years. Eventually, the shock of raw mana in your blood can become lethal if you willingly expose yourself to it too much. This puts as a fantasy counterpart to opioid painkillers, though with no indication to addictive properties.
==References==
Category:Spells and Magics