Bogbrew Witch

The closest thing this design has to a precedent is a tutor hard-wired to its own family: not a card type, not a converted mana cost, but two specifically named cards and nothing else. The witch is the engine of a deliberately self-contained three-card combo. She finds Festering Newt or Bubbling Cauldron, drops it onto the battlefield tapped, and the payoff is the loop where the cauldron eats a Newt to drain ten life from a single opponent. It is a designer's exercise in building a complete archetype out of three named cards, the rare instance of a tutor whose search clause points at a specific combo rather than a category. The activation has no timing restriction, so the assembly can happen at instant speed; what keeps it slow is the tap requirement and the fact that the engine takes multiple cranks to come online, with the 1/3 body built to survive between activations. What makes the build a closed system is that nothing here helps any other deck: the witch tutors for cards no one would otherwise run, and those cards do nothing without each other. That insularity is the point. It is one of the cleaner expressions of a build-around-me package handed to the player fully assembled, asking only that you find room for all the pieces and the patience to turn the crank.