Field of Dreams

• WWizards of the Coast2008-10-01
  Official Ruling
  This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.
• WWizards of the Coast2013-04-15
  Official Ruling
  When playing with the top card of your library revealed, if an effect tells you to draw several cards, reveal each one before you draw it.
• WWizards of the Coast2013-04-15
  Official Ruling
  The top card of your library isn't in your hand, so you can't suspend it, cycle it, discard it, or activate any of its activated abilities.
• WWizards of the Coast2013-04-15
  Official Ruling
  If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, the new top card won't be revealed until you finish doing so.

Rulings via Scryfall