Hello, my name is Gavman15 (it's also my Minecraft name) and I am going to tell you the tale of the Creeper Reaper.
Here it is:

Long ago, when creepers were first invented, I tried to create a NICE creeper. But instead of making a nice one, I made one that killed innocent villagers and players. Though it is only a myth, I have seen him roaming around my world (I wish it was a mod, it would be greatly appreciated). I have tried to make a skin of him and here is the link to it: http://www.planetminecraft.com/skin/creeper-reaper-with-song/ Now that you have seen him, it is also told that he leaves several creepers in his path. I made a mystery case story on the map. Though I don't know how you can tell people to download the map, it is an honestly tough mystery to crack. We have seen his HQ, in a ravine, and it is tricky to find it, though we did. I just need the support.
Thank you,
~Gavman15
P.S. Video message coming...