Re: Ruling Question: Can you stop a spell by untapping the land used for it?

 > Which means, that if a player has a card out that requires non-creature
> spells to have an additional cost of 1, and the player does not pay the
> additional cost immediately, the spell fizzles out?
Not so, since he has already played the spell for it's original cost. 
The "add one" would have came in after the spell was played.