Mana Short | Magic: The Gathering
Formats Mana Short is Legal in
Official Oracle Text for Mana Short
Official Rulings for Mana Short
10/4/2004 : If you play Mana Short in response to a spell, it will have no effect on that spell since the mana has already been paid.
10/4/2004 : It even taps lands that do not produce mana.