Watery GraveutilityBudget$11.34Produces both blue and black mana and has the same dual land role in Dimir decks. It enters untapped at the cost of life, making it one of the closest functional replacements.
Drowned CatacombutilityBudget$1.85Another blue-black dual land that supports the same color pair. It is often a budget-friendly substitute, though its untap condition makes it slightly less consistent.
Undercity SewersutilityBudget$23.25A modern blue-black dual land that serves the same fixing role. It provides both colors with strong utility in slower games due to its room mechanic.
Sunken HollowutilityBudget$0.38Fixes blue and black mana in the same color identity and can enter untapped in the right deck. It is a common functional stand-in for two-color control and midrange decks.
Choked EstuaryutilityBudget$0.35A blue-black dual land that fills the same fixing slot. It can enter untapped by revealing an Island or Swamp, making it close in play pattern to Underground Sea in many decks.
Tainted IsleutilityBudget$1.04Provides blue or black mana and is especially strong in decks with Swamps. It is a budget alternative that can be very efficient in the right manabase.
Morphic PoolutilityBudget$26.96A premium blue-black dual land that plays the same role in Commander and other singleton formats. It usually enters untapped when you have multiple opponents or a commander, making it very efficient.
Shipwreck MarshutilityBudget$6.39A blue-black slow land that performs the same color-fixing job. It is a solid, low-cost alternative for decks that can tolerate occasional tapped entry.