Rule 311.7 · Planes

Each plane card has a triggered ability that triggers “Whenever chaos ensues.” These are called chaos abilities. Each one is indicated by a chaos symbol to the left of the ability, though the symbol itself has no special rules meaning. This ability triggers if the chaos symbol is rolled on the planar die (see rule 901.9b), if a resolving spell or ability says that chaos ensues, or if a resolving spell or ability states that chaos ensues for a particular object. In the last case, the chaos ability can trigger even if that plane card is still in the planar deck but revealed. A chaos ability is controlled by the current planar controller.