History of CR 702.107a
Every distinct wording since 2010, newest first.
April 22, 2021 · Strixhaven
Outlast is an activated ability. “Outlast [cost]” means “[Cost], {T}: Put a +1/+1 counter on this creature. Activate only as a sorcery.”
May 3, 2019 · War of the Spark
Prowess is a triggered ability. “Prowess” means “Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.”
January 25, 2019 · Ravnica Allegiance
Prowess is a triggered ability. "Prowess" means "Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn."
September 25, 2014 · Khans of Tarkir
Prowess is a triggered ability. “Prowess” means “Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.”
February 1, 2010 · Worldwake
rule 702.107a not present in this release