Historical Rules · 3 July 2020
Rule 506.6d
Official source text from the 3 July 2020 Rules release
Some spells state that they may be cast “only before (or after) [a particular point in the combat phase],” but don’t meet the additional criteria described in rule 506.6c. If a turn has multiple combat phases, such spells may be cast that turn only before (or after) the stated point of the first combat phase.