1. At the beginning of each round of Chaos Invasion, 3 Chaos Cards will be randomly drawn from the Chaos Deck and applied to random Netherrealm stages in the plane.
2. Opening a Netherrealm stage corresponding to a Chaos Card will trigger the card's effect.
3. Defeat the Plane Watcher or Traveler of different planes and at different Timemarks to unlock new Chaos Cards. As the plane and Timemark increase, the Chaos Cards obtained will also become more precious.