Aetherworks Marvel defined its Standard format when it was used to put in play one of the best of the Eldrazi titans, Ulamog, the Ceaseless Hunger, ahead of time, effectively ending the game on the spot, but its a bit more of a roulette wheel in Commander
You instantly ruin another player's day or they counter one of your spells and make you feel salty
If anything, I think the history of things like phyrexian mana shows that Wizards does learn from their design mistakes
Looting Any ability that says "draw a card, then discard a card", usually on a creature who does this either as an activated ability or combat damage trigger

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