My Little Pony Fanfic? HELP PLEASE?!?

When I was a little girl, I read two fanfictions that I can no longer find. I do not remember the web address's, who wrote them, etc. I remember almost everything about it, however: It started off talking about the first earth pony ever, and how as it roamed the world it found the first sea pony, pegasus and unicorn, each one at a time. There was something about the unicorn showing off its magic or something by making lightning in the distance. There was another that dealt with a human and a regular horse and something happened (sorry, i cant recall that bit) and they stumbled upon ponyland and the horse transformed into Glory, and went off with the ponies to rule them. then there was another part where the human used some magic Glory gave to him before she left to transform into an old pony, and went to visit Glory at her castle. There was a festival going on and I think the human's intentions were bad or something, but thats all I recall. I apologize if information is scarce :[