Rule evolution
Rule 508.2a
Earliest archived Rules release: 2009-10-01 · 0 wording revisions · 0 renumberings
Earliest archived Rules release508.2aDetails
Abilities that trigger on a creature attacking trigger only at the point the creature is declared as an attacker. They will not trigger if a creature attacks and then that creature's characteristics change to match the ability's trigger condition. Example: A permanent has the ability "Whenever a green creature attacks, destroy that creature at end of combat." If a blue creature attacks and is later turned green, the ability will not trigger.