While few top-level tournament Decks use "Swords of Revealing Light" nowadays, you can still put this card to good use with "Exchange". Make sure that the only card in your hand is your own copy of "Swords of Revealing Light", then use "Exchange" to give it to your opponent. After your opponent plays "Swords of Revealing Light", you can use this card to destroy it and conduct your next "Battle Phase" twice, likely inflicting very heavy damage. In addition, "Exchange" will allow you to take the best card in your opponent's hand.
To speed up the combo, Set this card before activating "Exchange"; the moment your opponent activates "Swords of Revealing Light", this card will be automatically flipped face-up, causing its effect to activate immediately.