Rule evolution
Rule 509.4a
Previously numbered 509.7a.
Earliest archived Rules release: 2016-07-22 · 0 wording revisions · 1 renumbering
Added509.7aDetails
If the effect that puts a creature onto the battlefield blocking specifies it’s blocking a certain creature and that creature is no longer attacking, the creature is put onto the battlefield but is never considered a blocking creature. The same is true if the controller of the creature that’s put onto the battlefield blocking isn’t a defending player for the specified attacking creature.
Renumbered
509.7a→ 509.4aDetailsPreviously
5. Turn Structure
509. Declare Blockers StepThen
5. Turn Structure
509. Declare Blockers StepIf the effect that puts a creature onto the battlefield blocking specifies it’s blocking a certain creature and that creature is no longer attacking, the creature is put onto the battlefield but is never considered a blocking creature. The same is true if the controller of the creature that’s put onto the battlefield blocking isn’t a defending player for the specified attacking creature.