When a card is "removed from play" it is different from being sent to the Graveyard. Cards that are "removed from play" are put in a separate area off of the Game Mat. They are not part of your Graveyard or the field, and normally cannot be used again. When you read through your Dark Revelation volume 2 cards, you will see that there are many effects that will use cards which have been removed from play, and there are many powerful combos and strategies involving removed from play cards, including ways to use these cards again. Read through your card collection, and look for other Tip Cards in this booster set to see if you can create a Deck, which uses the full power of removing cards from play.