Today’s Arbitrary Card of the Day is Oblivion Ring. This card has been replaced by Banishing Light due to the bounce trick you can do to exile a card forever. Because Oblivion Ring has two separate triggered abilities, you could cast it, have it enter the battlefield to trigger the first ability, bounce it back to your hand, and then have the first ability resolve. Since your Oblivion Ring is already gone, the permanent you exiled will be gone forever. Banishing Light prevents this, making it work how Oblivion Ring was concepted to work.