If you haven't watched season 2 episode 17: 'A Dark Reflection' yet, now is the time to do so. The forces of good and evil were both searching for the Mortal Mirror, one of the three Mortal Instruments needed to raise the Angel Raziel. Meanwhile, Alec hid a huge secret from Magnus, and his deception might have damaged their relationship forever. Check out every thrilling moment with the official recap below.
Still unaware that Sebastian is her brother, Clary thought of a way to find him.
Clary remembered that Jocelyn had kept some of her brother's baby items, which she could use to track him. But then she noticed that someone had stolen the items from the box in her room. Later, we saw Sebastian burning them.
Alec told Max that he was ready for his first official assignment.
Izzy was furious because she was scared of what could happen to Max. She confronted Alec, who reminded her that Max was a soldier just like them.
Valentine and Sebastian tried to force Cleophas to fix the Soul Sword.
Cleophas explained that its destructive power had been deactivated. Valentine suggested a different way to achieve his goals: raising the Angel Raziel.
Sebastian attacked Elliot, a Warlock who knew the location of the Mortal Mirror.
Elliot fought back, but Sebastian's demonic power was too strong for him. Valentine only just managed to stop Sebastian from killing the Warlock.
Magnus surprised Alec at work with a lobster dinner.
Alec had been so busy that he forgot about their date, so Magnus brought dinner to him. Magnus told Alec about the Downworld meeting. The Seelie Queen did not trust the Clave, but he and Luke had stood up for Alec and his policy of transparency. Alec didn't follow his own policy when he failed to tell Magnus that the Soul Sword was not in the Clave's position.
Simon met Maia at the Hunter's Moon and asked if she would go boating with him. He knew about her interest in marine biology and thought it would be a fun date. Maia made up an excuse not to go, and said she only saw Simon as a friend.
Elliot killed himself so that he couldn't reveal the location of the Mortal Mirror.
Elliot refused to tell Sebastian and Valentine anything. Just as they were about to take him away, he killed himself using a magical incantation. The sigil on his arm disappeared when he died.
Dot arrived at the Institute with Elliot's sigil on her arm.
She knew that something had happened to Elliot, and thought she would be safe in the Institute. Clary told Jace and Alec that Jocelyn had given the Mortal Mirror to Elliot for safekeeping. Dot agreed to help find the mirror.
Clary and Jace found Elliot's body in his shop. Sebastian joined them.
Clary realized that her brother was responsible for Elliot's death when she saw dead flowers in the shop. Jocelyn had told her that when her brother was a baby, his presence caused flowers to die. Jace stated that he would kill him if needed, but Clary thought that Valentine might be manipulating him.
Izzy trained Max, with a little help from Simon.
Izzy felt that Max wasn't ready for a real mission yet, but Simon suspected she was being overprotective. While they took a break at the Jade Wolf, Maia arrived. Izzy immediately noticed that she had a thing for Simon.
Cleophas briefly escaped, and sent a fire message to Luke.
She was quickly recaptured, but not before she warned her brother that Valentine had the Soul Sword.
Luke told Magnus about the Soul Sword.
Luke thought that Alec, as head of the Institute, might know already. Magnus refused to believe that Alec had kept the truth from him.
Clary and Dot figured out where the Mortal Mirror was hidden.
Dot narrowed the location down to three options. Clary noticed that one of the spots was a park where she and Jocelyn had gone on picnics. They realized that Jocelyn had hidden the Mirror in a place that Clary would remember.
Sebastian tried to kiss Clary.
Clary told Sebastian that she wanted to save her brother. She couldn't stand losing someone else she cared about. Sebastian was overcome with emotion and tried to kiss her. Clary pushed him away. As she left the room, Sebastian took her hair tie so that he could track her.
Alec admitted that he hadn't been completely honest with Magnus.
He claimed that he hadn't told Magnus because he wanted to protect him. Magnus didn't accept his explanation and stormed out. Later, he told Luke that the Clave was not to be trusted. The only way to stop Valentine was to work with the Seelie Queen.
Clary, Jace and Dot found the Mortal Mirror in the park.
Sebastian ambushed them in his demonic form and almost killed Jace. Clary stopped Sebastian by talking to him and promising to help in any way she could. Then Dot attacked him and created a portal, which allowed Clary and Jace to escape with the Mortal Mirror. Dot was left behind.
Maia agreed to go out with Simon.
Izzy convinced Maia to give Simon a chance. Maia told Simon that she had made mistakes in the past, and just wanted to take it slow.
Back at the Institute, Clary looked into the Mirror and had a vision.
She saw herself drowning in Lake Lyn. Clary told Jace that her visions were some kind of message.
Max figured out who Sebastian really is.
He tracked a single hair which had accidentally been left behind in the box in Clary's room. The last thing we saw was Sebastian staring furiously at Max.
Watch season 2 episode 17 again here on Freeform.
And tell us in the comments what you thought the most thrilling moment was.