Predict

Most cantrips guess at the future; this one bets on it. You name the card before the mill, so the payoff isn't random card advantage but a wager on what's sitting on top of a library. Cast on your own deck, it rewards knowing exactly what's left to draw: name the four-of you're stacked with, name the card you scryed to the top, name a redundant piece in a deck thin enough that the odds tilt your way. Hit, and two mana at instant speed nets you a card; miss, and you've simply replaced the spell. The difference between those outcomes is purely information, which is why it pairs naturally with anything that fixes or surveils the top of a library, where the guess stops being a guess and starts being a setup. Cast at an opponent, it becomes a read on their deck instead, a far harder bet and rarely worth the slot. What sets the design apart is that the upside hides behind a skill check rather than a deckbuilding restriction: it asks the caster to know their own list cold rather than to clear a triggering hoop like spectacle or threshold. The reward scales with how much you've already done to engineer the answer, a quieter and more demanding kind of payoff than most card draw offers, and one that ages well precisely because the skill it taxes never goes out of fashion.