MAGNUS BANE COULD BE THE KEY TO ALL OF THE ANSWERS: The Shadowhunters will have to put their trust in a Downworlder to access Clary's memories.
After getting a clue about who may have wiped Clary's memories, the crew hunts down the High Warlock of Brooklyn, Magnus Bane. With all of the warlocks in hiding from Valentine, the team must lure Magnus out with something he can't refuse - a killer party and something very valuable. But with emotions running high, more may come out of their meeting with Magnus than just the retrieval of Clary's memories.
Meanwhile, Simon doesn't seem to be himself after his recent Downworlder encounter.
Simon became a darkling after drinking vampire blood, feeling like he is becoming a vampire, and is responding to urges like a sudden thirst for blood.
Simon mentioned Kirk Duplesse, a member of his band in the books.
Magnus is over 300 years old and has a reputation for his exquisite taste and his party-going habits.
Magnus and Camille had a relationship in the 1800s.
Magnus bought Camille a necklace that cost him his London townhouse. The necklace pulses in the presence of a demon.
Isabelle dressed Clary for the party where they were going to meet Magnus.