Richard Garfield, the creator of Magic: the Gathering, decided during the release of Alpha that booster packs would feature 15 cards
The best cards to pair with Braids will usually be Artifacts and Enchantments, as your opponents are less likely to be able to sacrifice those permanents than Creatures, but what makes her unique is that she pairs really well with cards that don't work well in other decks
Big creatures hit hard and fast, trampling over blockers without much thought
If all you buy is singles and these all arrive by mail, and you sort your mail at the dining room table, have somewhere to store your cards in that general area until you have time to sort
And here it is: The best spot removal ever printed in MTG, Swords to Plowshares
A little bit of a stretch, but the thought was clearly there