The Shadow Speeders are the predominant race in The Shadow Zone. They are lost Multiverse travelers who remained in the Shadow Zone for too long and became mindless shadowy raiders, which caused their matter to change into shadow matter. They are able to move about by defying normal laws of physics and constant contact with them will eventually turn anyone into another Shadow Speeder. Staying within the Shadow Zone too long will also cause a gradual transformation and they can only be destroyed temporarily.
The Shadow Speeders were once travelers who stayed for too long in the Shadow Zone and became mindless and agressive creatures whose sole purpose is to trap and transform other living beings into shadow speeders like them. They speak in high-pitched hisses and screeches.