This story is a sequel to Five years of Ice, A thousand years of Flame
Seven years ago, something hit Equestria. It was an accident. The ship that crashed held a single occupant, and proved to the world that they were not alone. Once informed of the dangers the universe presented, they were quite content to forget about it all, even choosing to ignore where the male alicorn came from.
And now there are two more. And they are a pain in the flank.
Sequel to Five Years Of Ice. (I'm also going to try and keep this one clean-ish.)