, Pay 1 life, Sacrifice this land: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.Marsh Flats helps a mana base support white and black while retaining access to other colors through the right lands. Its activation costs one life and the land itself, then finds a Plains or Swamp. That includes typed nonbasics, giving removal-heavy and graveyard-focused decks a useful choice of sources at the moment they need them.
Godless Shrine and Scrubland supply white and black from a single target. Raffine’s Tower adds blue for Esper, while Overgrown Tomb can supply green because its Swamp type qualifies. The search requires only one of the named land types, so matching targets to the whole deck is more useful than treating Flats as limited to two colors.
A deck using Brainstorm can resolve it, put unwanted cards on top, and then activate Flats to shuffle them away. Crucible of Worlds provides a longer-term interaction by allowing Flats to be played from the graveyard using a later land play. These uses give the land a role in card selection or recurring landfall beyond its basic fixing function.
The searched-for land follows its own entry conditions. Paying for an untapped Godless Shrine brings the total life expenditure to three, while a basic can keep that cost to one. A tapped three-color target may be worth choosing during a quieter turn. Keep enough legal targets for repeat searches, and remember that swapping Flats for another land improves access to colors without accelerating your land count on its own.
