“What did he mean by heartforgers?” She tapped at my heartsglass. “A different magic but with the same color. They’re of more use to the people than bone witches, so they aren’t as reviled. They can take memories and break them into bits and pieces, distill them down into potions and spells, and build them back up into new hearts, bright and counterfeit, so that even we can’t tell one heartbeat from the other. Fortunately, some artificial hearts cost more than a kingdom, and so few people bother.”