So Disney tells you that genies can't revive the dead and let's be honest we already have a Peter so let's not ask for more trouble, yeah? Still Stiles is really good at finding loopholes and after the Nogitsune disaster he really wants to make everything better. Everything that went wrong in the last two years of his life is the fault of Kate Argent so if he could find a way to stop her from harming the Hales? Bring it, he'd tell you. Beacon Hills would be protected, Scott would be normally happy, he wouldn't be hunted by nightmares (hopefully) and Derek could finally stop being so very sad. Actually, let's make a note and be sure of finding a good ritual to cleanse misfortune... he'll make Derek do it if it's the last thing he does, damn it!
In other words: Stiles finds a magical lamp (cough- coke can- cough) and just because he can't resurrect people it doesn't mean that he and Peter won't find a way to save everybody. They can get very creative if they want, and they really, really want to. They'll also have the help of a very powerfull being so let's open the dances.
Lily is dead. She gave her life so that her Harry could live and she loves him so much. Her james and she look over him but
They are Not Happy!
Especially now that Harry is walking to his death. A mother should never have to see her son die, especially considering that she can do nothing, absolutely nothing.
Lily's POV on the battle of Hogwarts. Can you imagine the anguish she would feel?