History of CR 615.1a

Every distinct wording since 2010, newest first.

May 3, 2019 · War of the Spark
Effects that use the word “prevent” are prevention effects. Prevention effects use “prevent” to indicate what damage will not be dealt.
January 25, 2019 · Ravnica Allegiance
Effects that use the word "prevent" are prevention effects. Prevention effects use "prevent" to indicate what damage will not be dealt.
May 1, 2014 · Journey into Nyx
Effects that use the word “prevent” are prevention effects. Prevention effects use “prevent” to indicate what damage will not be dealt.
September 30, 2011 · Innistrad
Effects that use the word "prevent" are prevention effects. Prevention effects use "prevent" to indicate what damage will not be dealt.
June 17, 2011 · Commander 2011
Effects that use the word “prevent” are prevention effects. Prevention effects use “prevent”
April 1, 2011 · Duel Decks: Knights vs. Dragons
Effects that use the word "prevent" are prevention effects. Prevention effects use "prevent" to indicate what damage will not be dealt.
February 4, 2011 · Mirrodin Besieged
Effects that use the word “prevent” are prevention effects. Prevention effects use “prevent” to indicate what damage will not be dealt.
October 1, 2010 · Scars of Mirrodin
Effects that use the word “prevent” are prevention effects. Prevention effects use “prevent”
February 1, 2010 · Worldwake
Effects that use the word "prevent" are prevention effects. Prevention effects use "prevent" to indicate what damage will not be dealt.