Rule evolution
Rule 509.3g
Previously numbered 509.4g, 509.5g.
Earliest archived Rules release: 2009-10-01 · 2 wording revisions · 2 renumberings
Earliest archived Rules release509.4gDetails
An ability that reads "Whenever [this creature] attacks and isn't blocked, . . ." triggers if no creatures are declared as blockers for that creature. It won't trigger if the attacking creature is blocked and then all its blockers are removed from combat.
Wording changed509.4gDetails
An ability that reads "Whenever [this creature] attacks and isn't blocked, . . ." triggers if no creatures are declared as blockers for that creature. It will trigger even if the creature was never declared as an attacker (for example, if it entered the battlefield attacking). It won't trigger if the attacking creature is blocked and then all its blockers are removed from combat.
Renumbered
509.4g→ 509.5gDetailsPreviously
5. Turn Structure
509. Declare Blockers StepThen
5. Turn Structure
509. Declare Blockers StepAn ability that reads “Whenever [this creature] attacks and isn’t blocked, . . .” triggers if no creatures are declared as blockers for that creature. It will trigger even if the creature was never declared as an attacker (for example, if it entered the battlefield attacking). It won’t trigger if the attacking creature is blocked and then all its blockers are removed from combat.
Wording changed509.5gDetails
An ability that reads "Whenever [
thisa creature] attacks and isn't blocked, . . ." triggers if no creatures are declared as blockers for that creature. It will trigger even if the creature was never declared as an attacker (for example, if it entered the battlefield attacking). It won't trigger if the attacking creature is blocked and then all its blockers are removed from combat.Renumbered
509.5g→ 509.3gDetailsPreviously
5. Turn Structure
509. Declare Blockers StepThen
5. Turn Structure
509. Declare Blockers StepAn ability that reads “Whenever [a creature] attacks and isn’t blocked, . . .” triggers if no creatures are declared as blockers for that creature. It will trigger even if the creature was never declared as an attacker (for example, if it entered the battlefield attacking). It won’t trigger if the attacking creature is blocked and then all its blockers are removed from combat.