You can find all the rulebook, module, and borderless cards in Set, Draft, and Collector Boosters, in both non-foil and traditional foil
Then all you need is a deck of 60 cards
Past in Flames is a staple in both Modern and Legacy, Cabal Therapy is a Legacy all-star, Conflagrate has finished many a game for Modern Dredge, Ancient Grudge is a sideboard staple, and the list goes on, including Lingering Souls, Roar of the Wurm, Dread Return, Unburial Rites, Desperate Ravings, Deep Analysis, and Faithless Looting
Knowing what cards are good in Commander is one of the first steps towards becoming well-versed in the format, but knowing why certain cards are good is even more important
Take flight, Stardust Dragon