Another one that doesnt look to exciting but could make the deck depending on the situation
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Ulamog, the Infinite Gyre or Ulamog, the Ceaseless Hunger
The same problem arises: The best decks use these resources well, so the gameplan disproportionately helps the decks that need the least help to begin with
Sure, you could build a deck to discard your own cards, but honestly, making your opponent discard is far more fun
Being able to dig up to four cards deep with Diresight allows you to put what you find into your hand/graveyard right now, no waiting around