Future Sight's dual lands are really unlike any other cycle in that the only thing they have in common is they are all dual lands. But they went on to spawn other future cycles such as Verge lands and Filter lands.
cards found.
River of Tears{T}: Add {U}. If you played a land this turn, add {B} instead.
River of Tears
Nimbus Maze{T}: Add {C}.
{T}: Add {W}. Activate only if you control an Island.
{T}: Add {U}. Activate only if you control a Plains.
Nimbus Maze
Horizon Canopy{T}, Pay 1 life: Add {G} or {W}.
{1}, {T}, Sacrifice this land: Draw a card.
Horizon Canopy
Grove of the Burnwillows{T}: Add {C}.
{T}: Add {R} or {G}. Each opponent gains 1 life.