" Jace had disappeared under the table. He appeared a moment later, holding Church, the Institute's part-time cat. Church had his paws stuck straight out and a look of satisfaction on his face. "We thought the same thing," said Jace, settling the cat on his lap. "But apparently, according to Magnus, there are spells that can be constructed to be activated by a warlock's death."
Emma glared at Church. She knew the cat had once lived in the New York Institute, but it seemed rude to show preference so blatantly. The cat was lying on his back on Jace's lap, purring and ignoring her. "

― Cassandra Clare , Lord of Shadows (The Dark Artifices, #2)