You and Jace – you’re not quite normal, are you? I mean, not normal Shadowhunters. There’s something special about you both. Like the Seelie Queen said. You were experiments.” He smiled at her startled look. “I’m not stupid. I can put these things together. You with your rune powers, and Jace, well…no one could be that annoying without some kind of supernatural assistance.
Cassandra Clare (2012). “Cassandra Clare: The Mortal Instruments Series (5 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels, City of Lost Souls”, p.1220, Simon and Schuster