Hogwarts...
Hogwarts was memories. Over the years memories had poured through the gaps in her stones like a gas. Life-changing memories, and even the ones forgotten in moments. But she could remember them all. She also held death. The pain and sorrow of many who had died within in her. But it wasn't until a full battle raged within her and their magic started to consume her that she began to take an interest. Memories and death. The castle ached from such an influx of both, but she could feel something new. When those who came to repair her surrounded themselves with a cloud of memory, she would choose to absorb it a little to they could continue to work. The workers would pour even more memories and even more magic into her, and she saw things she would never have guessed. Once she was fully repaired, her halls were filled once more. There were many who wore a cloak of memories. She never took it all away, but when it seemed to wrap itself up around the person and try to suffocate them, she would pull out its strength. Soon there were far fewer in number with that cloak, and she found herself with a rather new sensation. She felt unsatisfied. So when she found a flood of memories coming from three boys in the dungeon, she moved instinctively. Two of the boys watched as the walls around their third boy moved to shelter him. Using the memories of others long since gone, she pushed some of the magic she had gained into the boy, healing him. She slowly began to work with this new skill she gained, and every so often would interfere.
Hogwarts existed a while before another battle began. Again she was damaged, but she ignored this in an effort to stop the death. She didn't like death. No one died, but they kept fighting and she kept having to safe them, even from the green light that screamed death. The battle continued, and she began to realize that if no one died they might just fight forever. Indecision waged within her. Finally she reached a decision. Gathering the memories she had received, she found the ones that caused the most pain, using her magic she gave those memories to every person. Everything stopped, and Hogwarts found herself slipped away again. With no more memories, death, or even magic to sustain her she found that she could only exist long enough to watch the battle end and those fighting it turn away from each other.
I'm not quite sure what this ended up as. I started with a premise, lost it, and found this story instead. Oh well. Here you go.