Breeding Pool is a cornerstone land for blue-green decks, enabling them to cast spells on curve without colour issues. Standard archetypes like Simic ramp, landfall, or Omniscience-style builds rely on it as part of their mana base. Shock lands being fetchable and flexible keeps them highly played whenever they are legal. Its ubiquity in multicolour strategies ensures it remains one of the most seen lands in competitive play.