A/N: Okay, this authors note is to let my reader know that the beginning of this story shares some similarities with 'The Mad Man, The Witch and The Blue Box' by Crazhetalia. I would highly recommend that story if you like Doctor Who stories with adventures and elements of crossovers. Crazhetalia and I have been in communication, and are aware of the similarities of the beginning of our stories. We are both making attempts to not continuing our stories with similarities – which I am achieving by not reading passed chapter 6 of Crazhetalia's story. Despite how good their story is, I do not want to accidently influence my own writing by reading where they take their story.

A/N 2: I have now reached Chapter Twenty-Seven, which is the chapter after my turning point. I had two options to follow and I have decided to go with what I think might end up being the less popular option that I feel like fits the flow of writing better. Following this thread of the story, I have another eleven chapters mapped out, but it will take me a while to actually write those and post them.

edited 26/04/2022. Unlike my previous edited, there are actual changes to this preface.

Chapter 00: Madness

I knew that the wizarding world would come to an end. But I didn't think that it would come to an end by my hand.

I have fought for survival my whole life… from the night my parents were murdered until the night that stopping my fight would save billions.

I had thought, naïvely, that with Voldemort's death I could actually live my life – even if only for a short time. But the Death Eaters survived past the Final Battle.

At first, I tried to only fight the political battle after the death of Voldemort – ensuring that the Death Eaters were arrested and thrown in jail with as fair a trial as I could manage. I couldn't allow another like Sirius Black to end up in jail, 'just because they knew they were guilty' and the world needed to know why these Death Eaters decided to do what they did, and what it is exactly they had done. Some where simple guilty of financing Voldemort, or stepping aside in order to protect their own family, and they didn't deserve the same sentence as those who had truly believed in Voldemort's cause and willing killed and tortured.

Outside of trials and sentencing, I spent my time spreading the truth of what it was Voldemort believed in, the cause that he stood for and why it was that he'd fallen so far in to darkness. Using the darkness that had fallen upon the British wizarding world twice to explain why the wizarding world needed to change before another war was upon them – a war that their population wouldn't be able to survive.

Despite my best effort, the large majority of the wizarding world still lived within their prejudices, and I couldn't stop them all.

In the end the Death Eaters and Pureblood believers went after the last of my friends and their children to stop my defiance. I lost Neville, Ron, George, Molly, Arthur, Bill, Charlie, Andromeda and Hermione in the first wave of attacks where they targeted all my friends simultaneously. Luna, the four Weasley children and Teddy (my Godson) were the only once to survive since I had realised something was planned when there was an unprovoked attack on me. I had to make the choice on who to save, and I did what I knew they would have wanted – I saved the children.

I started the real fight then. Protecting what was left of my family and actively fighting the new threat with the mundane-born and magical Beings by my side.

But the wizarding world crumpled. The non-magicals found out about us and the world fell into a war. At first, I was able to maintain relative peace since a lot of the Beings listened to me and the mundane born (as they preferred to be known) had an intrinsic understanding of how the non-magical world thought and so they either helped or hid. And with the support of the Crown, there was relative piece. After three years, magical Beings across the world were given their treaties of peace and in some cases (such as the vampires, werewolves, goblins, dwarves and veela) they were given complete independence and land to call their own.

The wizards and witches weren't so lucky.

The Purebloods started attacking the mundanes, and there was no longer anything I could do for them, beyond ensuring that the mundanes didn't take their hatred out on the innocent children (particularly the half-blood and mundane-borns) or the magical Beings. The children were given protection on the land given to the werewolves and Veela's and in some cases mundane-born adults were also given sanctuary after having sworn to peace so that they could look after the children. Parents of these children, either moved with them or gave them up while they fought for understanding and peace.

However, the wizards wouldn't give in, and I held almost no power in the other countries – particularly Russia where the supremacy was as bad (or worse) then in Britain. And so, the attacks and destruction continued.

On her dying breath Luna told me of a way. A way to wipe out every last wizard and witch on the planet – saving the mundanes from themselves before they could go nuclear. Before I enacted the ritual, I tried to change it enough that it wouldn't kill the children or the innocent, but I had no way of knowing if it worked. So, I went forward with the guilt on my mind as though I had killed them all because I couldn't prove otherwise.

There were 2,637,706,132 children on planet earth at the time.

872,904 of them were magical.

I committed genocide to save the mundanes.

However, the ritual I used combined with my status meant that I couldn't die as well. A sacrifice was required. That sacrifice was my continued existence and inability to forget.

I saved all 2,635,960,324 mundane children.

I saved all 4,937,239,321 mundane adults.

But I will never forget the deaths of the 872,904 innocent children, which I (probably) caused.

Deaths that I would cause again, if it meant saving the rest of my planet. It was a hard choice.

An impossible choice.

I chose to kill my people so that the mundanes may survive.

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Everyone thought that the City of London was a common place, full of common people, living common lives. They were wrong. You leave behind a world full of wonder and magic and step into one with a Mad Man.

If you want a quiet life with chips and beans on toast, then living a life with me is not the way to go. I would also suggest staying away from Mad Men, especially one's with a Blue Box.

My incredible luck meant that I met the maddest of all Mad Men; who reached out one ordinary day, took my hand, and said "run."

So much for beans on toast; but this man, this Mad Man and his bigger on the inside Blue Box, is one of the best things that has ever happened to me. He's unusual, yes, but caring and amazing. He made me live my new life instead of just survive it.

I will never regret running that night.