dbs booster box Dragon Ball Super: Ultimate Advent DBS-B26 Android 21 Dragon Ball Super Card Game:

That deck is capable of meeting the six-card threshold

BT9-112 SEC Digimon Lv.7 DeathXmon Color Purple Black Cost 20 DP 15000 Digivolve Cost 1 PurpleBlack 6 from Lv.6 Form Mega Attribute Virus Type Unanalyzable/X Program Card Text 1 [Effect] When you would play this card, reduce its memory cost by 3 for each Digimon and Tamer your opponent has in play

Basically, cards which go above the standard numbering are Secret Rare cards

10 Teal Mask Ogerpon ex (Special Illustration Rare) $25.06 One Mask To Rule Them All Ogerpon is the undisputed star of the Teal Mask DLC in the Pokemon video games, but its reception in the Pokemon TCG has been lukewarm at best