Artifact, 1 (1)
Common (C4)
Whenever a player casts an artifact spell, you may pay {1}. If you do, you gain 1 life.
When sorely wounded or tired, Urza would often retreat to the workshops of his apprentices. They were greatly amazed at how much better he looked each time he took a sip of water.
Illus. Jeff A. Menges

10/4/2004: This will not trigger on its own casting. It must be on the battlefield at the time the artifact is cast.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander