Mistveil Plains

A white source that doubles as a graveyard launderer, recycling whatever you bury back into the bottom of your library for the price of one mana and the tap. The activation gate, two or more white permanents, demands genuine commitment to the color before the land does anything but make mana: it sidesteps becoming a free repeatable engine for a base that splashes white as an afterthought. The bottom-of-library clause is the wrinkle that matters most. Unlike effects that exile or shuffle, this hands a card back without erasing it from the game, which makes it a soft answer to graveyard hate, a way to re-buy a key spell you drew into too late, or a quiet way to reset a card into your deck for later. It also turns mill from a threat into a resource, sending a milled bomb to the bottom rather than letting it sit dead. The land enters tapped, the tempo tax every utility manabase pays for getting an extra ability stapled to its color source. Nothing about the rate is loud, and that is the point: it is fixing that happens to grind, built for the patient white deck that wants its library to last and its best cards to keep coming around again.