This mass storage box can hold several decks and/or play-mats, or alternatively up to 1000 individual cards in double protective sleeves.
It's brilliant if you want to rigorously maximise your card drawing in competitive play
The most important thing to know for this archetype is what rares and uncommons are actually worth stretching your mana for
Maybe youve bought one or two prebuilt decks in the past, and now you want to build one yourself
Convoke is also a helpful keyword, allowing you to turn all of your creatures into mana dorks to help pay for this
Theres something cool about generating large black Zombie Warrior tokens in a mono-white deck, but practically speaking, its nice to be able to diversify your colors in case a creature attacking you has protection from white (granted by Sword of Hearth and Home, for instance)