Heroic — Whenever you cast a spell that targets Arena Athlete, target creature an opponent controls can't block this turn.
9/15/2013 The heroic ability won’t cause a creature that’s already blocking to stop blocking or be removed from combat.
9/15/2013 Heroic abilities will resolve before the spell that caused them to trigger.
9/15/2013 Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.
9/15/2013 Heroic abilities won’t trigger when a copy of a spell is created on the stack or when a spell’s targets are changed to include a creature with a heroic ability.