Queen Umbra. The former tyrant of the Crystal Empire. She has returned thanks to dark magic and her plans are more sinister then ever. Through quick wit and treachery, she has put wedges between Equestria's heroes. Celestia has no choice to but summon a hero from a distant land. Will he be enough in these trying times to save everyone?

And how many sexy scenarios will he go through by the end?

{A crossover with Familiar of Zero}
Humanized Equestria, slight genderbend (only a few characters)