digimon booster cards TCG AD-01 English Digimon Generation Box Trading Card – COLLECTION REALM Digimon TCG: Classic Collection Booster

I bought a couple more boxes when I could locally and we were both hooked

Promo Info BOOSTER HACKERS' SLUMBER [BT-23] CLOSECLOSE BT23-066 R Digimon Lv [Main] By paying 3 cost and placing this card as the bottom digivolution card of your [King Drasil_7D6] or [Mother Eater] in the breeding area, Draw 1

I'll explain in more depth

Lower Text [Security] You may play 1 level 4 or lower red or green [TS] trait Digimon card from your hand or trash without paying the cost

until the End Phase, this card's name/Type/Attribute become the same as the original name/Type/Attribute of the monster sent to the GY to activate this effect

Secret Box is an Ace Spec card, meaning that players can only use one copy of it in their decks