I like Entropy for the Chaos die. Or simply Chaos. But… Entropy is the law of the universe that order tends to change into disorder. Heat tends to move into cool, not the other way around. Energy flows into non-energy. This sparks several ideas for die faces: one that causes a reroll of the die, potentially causing it to knock others about. One that causes rerolls of other dice. One that causes all the dice to remain exactly as they are (absolute zero).