Can't Quite Recall

Ancestral Recall costs one blue mana, draws three, and sits behind more restriction than almost any card ever printed. This one costs one blue mana, draws three, and cannot be restricted, because the Forbidden keyword already bars it from your deck. That is the entire joke and the entire design: a card whose reason for existing is to sit outside the ninety-nine (or the sixty) and dare you to find a legal route onto the stack through some external mechanic. As an instant it never touches the battlefield, so the puzzle is purely one of casting from a place that is not your library: the corner-case tutors, the "choose a card from outside the game" effects, the wish and sideboard interactions most deckbuilders treat as noise. Forbidden inverts the assumption every other card shares, that a card's power gets paid for by the cost of running it in your list. Here the cost is not a mana value but a construction problem: the single blue pip winks at the game's most famous piece of card advantage, and the punchline is that the casting was never the hard part. It functions only as a novelty, because it treats deck construction itself as a resource to be circumvented rather than a constraint to be honored.