These are a cycle of Magic: the Gathering cards. These particular cards were first debuted at PAX Prime on August 30th at the Khans of Tarkir discussion panel. These specific cards are called "fetchlands" because they search your library for other cards. This makes them extremely valuable as they help you get the cards you need earlier in the game. When these 5 cards were announced, the community of Magic: the gathering players went crazy! Many of the prominent Magic players promptly took flight to twitter and other social media sites to exclaim their animosity at this announcement, such as Brian Kibler or Louis-Scott Vargas, both of whom are regarded as incredibly skilled magic players. Now when I saw the fetchlands get announced I was instantly thrilled and became extremely excited for the set of cards that would have the fetchlands, Khans of Tarkir. The fetchlands would mean that I could create better decks and create better strategies for existing decks that I already had! It was like a miracle had happened!