Every distinct wording since 2010, newest first.
July 12, 2019 · Core Set 2020
Some activated abilities and some triggered abilities are mana abilities. Mana abilities follow special rules: They don’t use the stack, and, under certain circumstances, a player can activate mana abilities even if they don’t have priority. See rule 605, “Mana Abilities.”
July 16, 2010 · Magic 2011
Abilities of emblems function in the command zone.
February 1, 2010 · Worldwake
A spell or ability on the stack is an illegal target for itself.