

Rush.
While there are at least 10 cards in opponents' cemeteries, this has Assail.
Put a Gilded Blade token into your EX area. Each opponent buries the top card of their deck.
QI declare an attack on a reserved enemy follower with this follower while there are 10 cards in my opponents' cemeteries. If an effect at Quick timing removes a card from my opponents' cemeteries, bringing the number to 9, does the attack still go through?
AYes, it does.