“Then this is for you," Galahad said, and drew a knife from the pouch at his belt. It was an odd little thing, T-hilted and small enough to fit into a woman's hand. Its translucent blade, only an inch and a half long, was bound with scrolling bronze wire to the bone hilt. "Have a care. Obsidian is sharper than anything else in the world, sharp enough to make sunlight bleed.”