YGO TCG Egyptian God Deck: Obelisk/Slifer - Rules of Play says:
Awaken the power of the Egyptian God Cards! If you’ve ever wanted to build a Deck around an Egyptian God Card but didn’t know where to start, look no further than the Egyptian God Decks! Egyptian God Deck: Slifer the Sky Dragon/Egyptian God Deck: Obelisk the Tormentor serve up simple strategies to Summon and win with either Slifer the Sky Dragon or Obelisk the Tormentor.