Sherlock always hated his wings. They served as a reminder to what… no, who he was. They were always there, but to the common eye, they were invisible. No one could see them, or touch them. At one time, years ago, they were beautiful wings. Now though, they were blacker than any of the others. Well, than most.
Moriarty never even knew how close to the truth he was when he told Sherlock that he was on the side of the angels. Sherlock had been at one time. Then again, Sherlock was an angel. Just he had fallen years ago. Mycroft had been the one to find Sherlock when he was thrown out of Heaven. He took him to the Holmes estate where Mummy Holmes decided to adopt Sherlock and create a whole back story about him.
They knew, Mummy and Mycroft, about who/ what he really was. Sherlock had told them shortly after they took him in. Molly knew now as well. Sherlock decided to tell her as they planned how he was going to fake his death. He showed her his wings, which took a lot more effort than he remembered. She hadn't been scared by them. She only asked John knew.
John.
You're doing this for him Sherlock.
Sherlock explained to Molly about how he wanted to tell John and show him his wings, but…. Moriarty came along. Sherlock was able to figure out his plan. He couldn't tell John. Even though he wanted to so badly. John made him feel… nice. He felt loved. After being tossed aside by his brothers and sisters. Well most of them. Gabriel and Castiel had visited him a few times over the years. Though, Gabriel was dead now and apparently Castiel was helping two American brothers to stop the Leviathans from opening up Purgatory. Sherlock hadn't heard Castiel in months, which was beginning to scare him. He loved talking with Castiel about John. Castiel loved to talk about Dean with Sherlock. Two angels (one fallen) in love with humans.
Don't let your thoughts run away. Focus now Sherlock. You need to call him. Find a way to warn him. You need to hear his voice one last time. So if this all fails, if your wings don't help, your last memory will be of you talking to him. This is why you're doing this. John. You need to save John.
Sherlock calls John. One of the only contacts in his phone. Sherlock begins to cry during the conversation.
Warn him.
"It's just a trick. It's all a magic trick." Sherlock tells John. The conversation ends.
Now. You have to complete Moriarty's story. You'll see John again someday.
Sherlock falls. Four stories off the roof of St. Bart's. Folding his wings around him, cocooning him from any severe damage that would happen from a fall such as this, Sherlock hits the pavement. The force of the fall causing the strategically placed blood packets to break. Sherlock had placed a small rubber ball under his right arm, so when John tries to check his pulse, there won't be one to find.
