Wizards experimented with 'symmetric draw' with cards like Secret Rendezvous, where you and another player could both draw cards, but giving your opponent an advantage for something they could probably do themselves feels like a much bigger drawback than other colors
III: The Brothers' War deals X damage to any target and X damage to any other target, where X is the number of artifacts you control
And finally Kytheon, Hero of Akros was a short-lived experiment that was meant to convert Human triggers into a no-mana-required value engine, but it turns out that his Planeswalker mode doesn't really generate value the way others do
Bloomburrow's squirrel-themed Commander deck, Squirreled Away, is known to do much the same
Its a card that anyone whos not got it in play hates, because what actually happens is that everyone will pay the cost for a turn or two, but once someone stops, everyone does
Notable Rares Of The Mystic Archive A handful of the rare cards of the Strixhaven mystic archive are standouts as well, and players should be excited to get them in booster packs