Dwarven Miner

A repeatable land-destruction engine stapled to a body, built for an era when nonbasic lands were the targets worth spending mana on. The design discipline is in the targeting clause: it cannot touch a basic, so the threat is calibrated to punish utility lands, dual lands, and value lands without letting a red deck strangle an opponent's mana base entirely. That restriction is what keeps a recurring effect from being oppressive; the cost (a creature, plus three mana and a tap each activation) means each land you blow up is a real tempo commitment, not a free swing. The Dwarf tag and the modest body were never the point. This is a creature only so that it survives sorcery-speed answers differently than an enchantment would, and so it can be searched, recurred, or blinked by the toolkits that care about creatures rather than the ones that care about spells. It belongs to a long tradition of slow, grinding artillery: not a haymaker that two-for-ones the board, but a tax that a greedy mana base has to keep paying, turn after turn, until something gives.