Rule evolution
Rule 506.7b
Previously numbered 506.6b.
Earliest archived Rules release: 2010-02-01 · 0 wording revisions · 1 renumbering
Added506.6bDetails
A spell that states it may be cast "only before (or after) blockers are declared" is referring to the turn-based action of declaring blockers. It may be cast only before (or after) the declare blockers step begins, regardless of whether any blockers are actually declared. (See rule 509.)
Renumbered
506.6b→ 506.7bDetailsPreviously
5. Turn Structure
506. Combat PhaseThen
5. Turn Structure
506. Combat PhaseA spell that states it may be cast “only before (or after) blockers are declared” is referring to the turn-based action of declaring blockers. It may be cast only before (or after) the declare blockers step begins, regardless of whether any blockers are actually declared. (See rule 509.)