“That will fade,” Shai said. “The impressions will wash away like the remnants of a bad dream. In an hour, you’ll barely be able to recall what it was that upset you.” She scribbled some notes. “I think you reacted too strongly to me insulting your brother’s memory. Ashravan worshipped his brother, but kept his feelings buried deep out of guilt that perhaps his brother would have made a better emperor than he.”

“What? Are you sure?”

“About this?” Shai said. “Yes. I’ll have to revise that stamp a little bit, but I think it is mostly right.”

Gaotona sat back down, regarding her with ancient eyes that seemed to be trying to pierce her, to dig deep inside. “You know a great deal about people.”

“It’s one of the early steps of our training,” Shai said. “Before we’re even allowed to touch soulstone.”

“Such potential…” Gaotona whispered.

Shai forced down an immediate burst of annoyance. How dare he look at her like that, as if she were wasting her life? She loved Forgery. The thrill, a life spent getting ahead by her wits. That was what she was. Wasn’t it?

She thought of one specific Essence Mark, locked away with the others. It was one Mark she had never used, yet was at the same time the most precious of the five.

“Let’s try another,” Shai said, ignoring those eyes of Gaotona’s. She couldn’t afford to grow offended. Aunt Sol had always said that pride would be Shai’s greatest danger in life.

“Very well,” Gaotona said, “but I am confused at one thing. From what little you’ve told me of this process, I cannot fathom why these seals even begin to work on me. Don’t you need to know a thing’s history exactly to make a seal work on it?”

“To make them stick, yes,” Shai said. “As I’ve said, it’s about plausibility.”

“But this is completely implausible! I don’t have a brother.”

“Ah. Well, let me see if I can explain,” she said, settling back. “I am rewriting your soul to match that of the emperor—just as I rewrote the history of that window to include new stained glass. In both cases, it works because of familiarity. The window frame knows what a stained-glass window should look like. It once had stained glass in it. Even though the new window is not the same as the one it once held, the seal works because the general concept of a stained-glass window has been fulfilled.