Enchantment, 1W (2)
Uncommon
Whenever an opponent taps a Mountain for mana, you may gain 1 life.
"The peasants labor for my profit. I approve."
Illus. Patrick Faricy

10/4/2004: Gaining life is optional. If you forget, you can't go back later even if it is something you usually do.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern