Furnace Punisher
Most punisher-shell creatures aim a universal threat at the opponent and let them pick which cost to eat: your life, your hand, your board. This one narrows the aperture to a single deckbuilding decision, taxing the choice to skimp on basic lands. Two basics is a trivial bar for a mono-color midrange deck and a standing wall for a nonbasic-heavy manabase leaning on shocklands, duals, and painlands, or for an artifact-mana or big-mana pile that runs almost no basics at all. The lopsidedness is the entire function. Each player's own upkeep is when the check fires, so nobody is on a shared clock; instead every player pays a levy on their own turn, measured by how they registered their lands. Against a basic-forward opponent it goes quiet and reverts to an ordinary menace beater. Against the greedy pile it turns their fixing into two recurring points of damage a turn, self-inflicted and repeatable, though damage rather than life loss means a prevention or replacement effect can blunt it. And the tax is fragile: it rides a 3/3, so any removal that answers the body answers the check with it. The real pressure is the decision it forces once it resolves: keep taking two, or spend a card to stop it. Menace makes that a live problem, ensuring a lone blocker cannot simply park in front of it while the opponent decides whether the hoser is worth removing.
