Powerleech
Enchantment
Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without 
in its activation cost, you gain 1 life.
The Forest of Argoth has developed a resistance to mechanical intrusion.
Christopher Rush
Antiquities (ATQ)
• #34Rulings
In a multi-player game it affects all opponents.
(wotc • 2004-10-04)
Rulings
In a multi-player game it affects all opponents.
(wotc • 2004-10-04)