Scavenger Grounds

Graveyard hate has historically carried a tax: to run it, you gave up a spell slot or a colored card, and your manabase paid nothing for the privilege. This collapses that cost into the land drop. It taps for colorless like any utility land, then, for two more mana, sacrifices itself to exile every graveyard at once, so the deck builder pays for the answer in lands rather than in spells. The self-referential elegance is that it is itself a Desert: the activation needs a Desert to feed the sacrifice, and it can eat itself, so a single copy functions in any deck with no supporting land subtheme required. Manabases already running other Deserts gain flexibility (you can sacrifice one of those instead and keep the Grounds around), but nothing about the card demands that. The exile clause is comprehensive, hitting all graveyards rather than a single target, which makes it a reset button against recursion engines and delve costs alike rather than a surgical strip. As a piece of color-pie work it gives colorless decks access to a sweep that has historically lived in white and green enchantments or black exile spells, paid for entirely through the land slot. The trade is speed for invisibility: it announces nothing, costs no card, and sits in play as an unremarkable source of colorless mana until the turn it ends someone's whole graveyard plan.