They build a decklist on paper and then buy the individual cards either from a game store, or a website like TCGPlayer
That said, it might be a safer choice for a permanent than Atraxa or Valgavoth, so a one-of might be viable
Maybe we want to go the Voltron route here, loading Chromium up with sweet Auras to boost the size and add all sorts of cool abilities
Zendikar is one of the most mana-rich lands in the Multiverse, and the set included several important milestones: land-based mechanics like landfall, the completion of the fetch land cycle introduced in Onslaught , and the inclusion of full-art basic lands in a major expansion set
Kheru Mind-Eater [Vampire]: With Menace, you stand a much better chance of dealing damage directly to an opponent
Our commander surveils, which not only helps us find our reanimate spells but also helps get more creatures into the graveyard without the whole messy process of drawing, casting, and getting them to die