This is a mod for the game Vampire: The Masquerade - Bloodlines that makes the game a bit more Glittery and Sparkly.
There too is the practice of drinking blood and covering in sparkling diamond powder to inspire fear on others. Imagine the oponents cowering in fear when you have blood dripping from your mouth and your skin and perhaps your own armor is covered in glittering diamond powder.
And Maybe there were some sort of archetype of knight called "BloodSparks"