Chaos (Final Fantasy XIII)

a storyline element Chaos (カオス, Kaosu) is a matter in Final Fantasy XIII-2 which comes from Valhalla. It seems to be able to create illusions (like Lightning's as seen in TGS 2011 Trailer "Promise") and and act as embodiment of people (as seen dring Caius's attack on Noel in TGS 2011 Trailer "Despair"). It also allows control of Eidolons as seen in Caius's case in which he controls Fang's Eidolon, Bahamut.

Trivia

 * Chaos resembles pyreflies from Final Fantasy X.