What happens if you can't afford the power cost to play any of the cards revealed with Promising Future?

Ruling: If you cannot afford to play any of the cards revealed by Promising Future, you cannot choose any of them as legal targets. All five cards are recycled as "the rest" (non-chosen cards).

Sequence:

• Look at the top 5 cards of your deck
• Attempt to choose a card to play
• If no cards can be legally played (due to power cost or other restrictions), no card is chosen
• All 5 cards are recycled as "the rest" since none were chosen

Nuances:

• A card can only be "chosen" if it is a legal target that can be played
• The phrase "recycle the rest" refers to all non-chosen cards
• If a card is chosen but then cannot be played, it would return to its zone of origin (top of deck), not be recycled with "the rest"
• The initial suggestion that the entire spell would be rewound was determined to be incorrect
• This interpretation is considered reasonable until a revised comprehensive rules document addresses it officially