Shai

“You can’t possibly expect me to do this without soulstone,” Shai said drily. “I could carve a stamp out of wood, if I had to, but your goal will be difficult enough as it is. Soulstone. Lots of it.

Page 30, day 2 the emperor’s soul

Those marks finished, she held the stamp over a flame. This was a property of soulstone; fire hardened it, so it could not be chipped. She didn’t need to take this step. The anchoring marks on the top were all it really needed, and she could carve a stamp out of anything, really, so long as the carving was precise. Soulstone was prized, however, because of this hardening process.

Page 66, Day 30, The Emperor’s soul