As Commander is a format rife with mana rocks and utility artifacts, this single card can most often provide its caster with enough mana to run away with a game, whether it's played in the early or late stages of a Commander game
FAQ Which option is best for printing an entire Commander deck
On modern MtG cards, there are two different methods that can be used to distinguish a cards rarity with ease
Against decks that I suspect to be bringing in artifact removal, I sideboard out all four copies of The Rack
Youve got commanders that feed into this strategy, like Maester Seymour, Kodama of the West Tree, and Bristly Bill, Spine Sower, as well as an infinite well of support pieces including tons of counter amplifiers like The Earth Crystal, Hardened Scales, and Kami of Whispered Hopes