The Great Wall of China has today been derided as a monument to foolishness, yet it would be centuries after its construction until China would be taken again by Rapidash riders. And when it was, it was not by Rapidash flames and arrows as in most of their wars, but by a remarkable subterfuge dependent on the Duskull.
Duskull had long been known for their ability to phase through the walls of tents or houses, yet as late as the Ming Dynasty they had never been used for sieges: although a Duskull can sneak into a fortress, it can do little once it gets there. Yet conquerors do not use Duskull for such petty schemes as assassinating sentries. Instead, an elite squadron of Duskull were trained to surround themselves in their own mist and emulate the sound of a Rapidash's hooves and the clank of armor. With an army behind them, they floated through the Great Wall and kept going south: Ming soldiers, convinced the wall had been breached and that they were surrounded, surrendered without facing a single fire blast. Deprived of their fortifications, wrapped up in internal chaos, and with their army deserting in droves for fear of battling an army of the dead, the Ming dynasty were vanquished.
This particular scheme has been used once in history, and only once, for future guards everywhere were trained not to take mist and noises at face value in areas where Duskull are common. Instead, soldiers spent the rest of the age of fortresses attacking in the fog, hoping to be mistaken for the Duskull who conquered China.
