" Kaz took a handkerchief from his coat pocket and carefully wiped his face clean. He thought of Inej lying still on the table, her slight weight in his arms.
"Hold him," he told Jesper and the Fjerdan. Kaz flicked his coat sleeve, and an oyster shucking knife appeared in his hand. At any given time he had at least two knives stashed somewhere in his clothes. He didn't even count this one, really -- a tidy, wicked little blade. "

― Leigh Bardugo , Six of Crows (Six of Crows, #1)