Underground Riverutility$1.93A two-color UB fixing land that can produce either color immediately, playing a similar role as efficient early-game mana fixing.
Dismal Backwaterutility$0.22Provides both blue and black mana fixing in one card, with the added upside of gaining life at the cost of entering tapped.
Dimir Aqueductutility$0.22A Dimir dual-land style fixer that produces both colors over time and can support the same UB manabases, though it is slower and more restrictive.
Choked Estuaryutility$0.35An efficient UB dual land that usually enters untapped in the early game, serving the same mana-fixing function in Dimir decks.
Sunken Hollowutility$0.38A UB dual land that fixes both colors and can enter untapped later, making it a strong functional alternative for multicolor mana bases.
Watery Graveutility$11.34A premium UB dual land that provides the same color access more flexibly by entering untapped at the cost of life.
Underground Seautility$1085.75The most efficient UB fixing land, directly replacing the same role with no downside beyond being a high-end staple.
Tainted Isleutility$1.04A budget UB fixer that taps for either color once you control a Swamp, offering similar two-color support with some deckbuilding constraints.