Stolen Goods

• WWizards of the Coast2012-05-01
  Official Ruling
  If you cast a card "without paying its mana cost," you can't pay any alternative costs. You can pay additional costs, such as kicker costs. If the card has mandatory additional costs, you must pay those.
• WWizards of the Coast2012-05-01
  Official Ruling
  If there are no nonland cards left in that library, the opponent will exile all cards from their library, and Stolen Goods will finish resolving.
• WWizards of the Coast2012-05-01
  Official Ruling
  If you can't cast the nonland card (perhaps because there are no legal targets available) or if you choose not to cast it, it will remain exiled.
• WWizards of the Coast2012-05-01
  Official Ruling
  If the card has in its mana cost, you must choose 0 as its value.
• WWizards of the Coast2012-05-01
  Official Ruling
  You must follow the normal timing restrictions of the exiled card.
• WWizards of the Coast2012-05-01
  Official Ruling
  You cast the card from exile. Each land card exiled this way will remain exiled.

Rulings via Scryfall