Talk:Stack Defense/@comment-37906621-20191027203040/@comment-32271305-20191027205649

Each boosts lasts 99 turns, including the turns in which the card hasn't been on rotation. The countdown is for every single Super Attack, regardless of how many cards buff their defense. And after 99 turns their Super Attacks will still buff their defense, only difference is that the first buffs from the very start of the battle would start to expire.