The Discordia were a race that resembled devils. They took the form of the greatest fears of their prey. With their transformation abilities, they could morph their limbs into armaments and tools of various stages of technological advancement. The could easily move throughout time, often using foreknowledge in order to retro-engineer their technology and avoid unwanted outcomes.
After the Last Great Time War, the Discordia discovered time travel technology on their home planet and began to spread chaos throughout time, with no one left to oppose them. (AUDIO: Time in a Bottle)