This is the very first booster to be released simultaneously worldwide! Starting with Digimon Adventure Digimon from the TV anime over the years are included as cards. Some of the Alt-Art cards in the lineup are designed by illustrators outside Japan and will only be included for the English version of the product! This booster includes autograph cards with new illustrations by 7 popular illustrators! Moreover, like the previous Special Booster ver2.5 [BT19-20], BT21 will also have a serial number card included at a low rate.