Dash Hopes

• WWizards of the Coast2007-02-01
  Official Ruling
  As the triggered ability resolves, the active player gets the option to perform the action. If that player declines, the next player in turn order gets the option. As soon as any player performs the action, the spell is countered, but the remaining players still get the option. If all players decline, the spell remains on the stack.
• WWizards of the Coast2007-02-01
  Official Ruling
  When this spell is cast, its “when you cast” ability triggers and goes on the stack on top of it.
• WWizards of the Coast2013-07-01
  Official Ruling
  A player can’t choose to pay 5 life unless they actually have 5 or more life to pay.

Rulings via Scryfall