You can manipulate your own deck to make sure youre hitting the best possible cards for this, but its also just good fun using your opponents cards against them too
I am sure expert players will laugh, but I classify the white cards in my mind as life-giving because of the white sorceries and instants that do just that
Your deck of cards represents your feedback, like the cards are the magic you know, or the creatures you can excite in your row to defeat your opponents.
Indomitable Creativity (red), Jund (black/red/green), Death's Shadow (black/red/blue), Rakdos Midrange (black/red), and more decks make use of this discard spell to absolutely hose opponents playing burn or other hyper aggressive strategies
17 Graveyard Making up a massive portion of Commander decks, Graveyard decks come in a wide variety of forms, but all aim to use their graveyard as a source of value