If a spell or ability uses a description of an object that includes the word “source,” it means a source matching that description—a source of an ability, of damage, or of mana—in any zone. See rules 113.7 and 609.7.
May 3, 2019 · War of the Spark
If a spell or ability uses a description of an object that includes the word “source,” it means a source matching that description—either a source of an ability or a source of damage—in any zone. See rule 609.7.
January 25, 2019 · Ravnica Allegiance
If a spell or ability uses a description of an object that includes the word "source," it means a source matching that description-either a source of an ability or a source of damage-in any zone. See rule 609.7.
May 1, 2014 · Journey into Nyx
If a spell or ability uses a description of an object that includes the word “source,” it means a source matching that description—either a source of an ability or a source of damage—in any zone. See rule 609.7.
September 30, 2011 · Innistrad
If a spell or ability uses a description of an object that includes the word "source," it means a source matching that description -- either a source of an ability or a source of damage -- in any zone. See rule 609.7.
June 17, 2011 · Commander 2011
If a spell or ability uses a description of an object that includes the word “source,” it means a
April 1, 2011 · Duel Decks: Knights vs. Dragons
If a spell or ability uses a description of an object that includes the word "source," it means a source matching that description -- either a source of an ability or a source of damage -- in any zone. See rule 609.7.
February 4, 2011 · Mirrodin Besieged
If a spell or ability uses a description of an object that includes the word “source,” it means a source matching that description—either a source of an ability or a source of damage—in any zone. See rule 609.7.
October 1, 2010 · Scars of Mirrodin
If a spell or ability uses a description of an object that includes the word “source,” it means a
February 1, 2010 · Worldwake
If a spell or ability uses a description of an object that includes the word "source," it means a source matching that description -- either a source of an ability or a source of damage -- in any zone. See rule 609.7.