Personal Tutor
The narrowest member of the one-mana tutor family, and the one whose restriction tells you exactly how its designers thought about card selection. Mystical Tutor finds any instant or sorcery at instant speed; Vampiric Tutor grabs anything for a life payment; this one is locked to sorceries and to the slowest possible window, since setting up next turn's spell means surrendering tempo twice over. That friction is the whole balancing act: a single blue mana to put any sorcery on top is a powerful enabler, so the cost is paid in time rather than mana or life. Planning a turn ahead is what makes it read as fair in fair decks and broken only when the sorcery it fetches ends the game by itself. Born in Portal, the beginner-focused product that quietly seeded a number of efficient effects later prized far outside their original audience, it carries the design fingerprint of that line: clean text, no hidden modes, a single decision point. The constraint to sorceries is what keeps it from collapsing into a universal "find your best card" button; it is a deckbuilding tax that rewards loading up on game-warping sorceries rather than a toolbox of mixed answers.
