Dust Bowl

Repeatable nonbasic land destruction with a feeding cost, and the design tension lives entirely in that sacrifice clause. The activation eats a land of your own each time you fire it, so the ability is self-throttling: every nonbasic you destroy walks your own manabase backward, and the more you use it the fewer lands you have left to use it with. That friction is what lets the effect be repeatable at all without being oppressive. The colorless mana ability is the consolation when you are not blowing up lands: in the turns between activations, the land still contributes to your mana, and when there is nothing worth destroying it is just another fodder land for the sacrifice mouth later. What it actually answers is the manland and the value land: creature-lands, utility lands, anything that dodges conventional removal by living in the land slot. Basics are immune by the targeting restriction, so this never becomes a true mana-denial lock against a stock deck; it punishes greed specifically. The card represents an early school of land hate that trades resource parity for the ability to keep answering threats turn after turn, asking you to win the race before you run yourself out of fuel.