Sparks are the race that birthed all of the other races. As far as anyone living knows, they no longer exist in their pure forms, but they live on inside of their descendants. They were pure energy beings who chose to take on mass and then found they could not rid themselves of it. They have a natural connection to the magical force of their world, a force with power connected to the chaos of the world (see: Magic)
Their immediate descendants are the Shifters.