Storm Cauldron | Magic: The Gathering
Formats Storm Cauldron is Legal in
Official Oracle Text for Storm Cauldron
Whenever a land is tapped for mana, return it to its owner's hand.
Official Rulings for Storm Cauldron
10/4/2004 : If a land is tapped for mana, it is returned to its owner's hand as a triggered ability.
10/4/2004 : Having multiples of these on the battlefield means you can play an additional land for each one.