900 card binder Pokemon Binders 9-Pocket Holds Cards, PU Leather Zipper Collection Album With 50 Removable Sleeves, Metal 3-Ring, For Trading Cards, Baseball, Football, Basketball, Playing Cards this album is a collectors dream 900 Card Pocket Binder with

The card must be activated during the start of your Main Phase 1, & requires you to shuffle 3 Monsters with different Types into the Deck in order to draw 2 cards

I think the baseline for a master set is one copy of all regular cards and one copy of every reverse as Quuador mentioned

BT7-040 SR Digimon Lv.6 Alternative Art Rasenmon Color Yellow Cost 11 DP 11000 Digivolve Cost 1 Yellow 5 from Lv.5 Form Mega Attribute Data Type Beastkin Card Text 1 [Effect] When digivolving into this card from your hand, the memory cost of the digivolution is equal to the number of cards in your security stack

Incapsula incident ID: 1551000700188243697-116230838857699721

You can only use this effect of "Drowning Mirror Mage" once per turn