DOTA - Requiem of Shadows.

When Trixie finds a shadowy stone of odd power, she quickly discovers that it's not just what it seems. Time and dimensional forces work against Equestria in this adventure tale. (Dota 2 heroes in Equestria)

When The Great and Powerful Trixie comes across a strange stone of shadow in the forest, she wonders what the future will hold with her new found object of power.

But As she and the rest of Equestria will find out, the stone is not an object from their world.