BW tends to be on the slower side of archetypes, and it generally wants to play a longer game with lots of card advantage and removal spells
5 Bazaar Of Baghdad $2,124.99 A land that doesn't provide any mana
This information will always be notated in the top left corner of the card and will even show a small picture of the Basic Pokemon it evolves from in the case that you need a visual reminder
3 Mana Vault Sol Ring's Edgier Cousin There's no compelling reason why Mana Vault's legal in Commander, since it essentially skips any player who has it two turns ahead of their competition
So you're encouraged to play cards that cost 3 or more, and it's a complicated puzzle to balance with creatures to target, high quality spells that target, and have the ramp to do them
When you look and see cards like Golden Guardian or Omnath, Locus of Rage, they're largely filling this role, and others are more filled by utilitarian aspects like an Eternal Witness that you meet along your adventures