History of CR 610.4c

Every distinct wording since 2010, newest first.

August 7, 2020 · Double Masters
If a resolving triggered ability creates the initial one-shot effect that causes the permanent to phase out, and the specified event has already occurred before that one-shot effect would occur but after that ability triggered, the permanent doesn’t phase out.
February 1, 2010 · Worldwake
rule 610.4c not present in this release