Eclipsed Realms is a uncommon Land card from Lorwyn Eclipsed (ECL), collector number 263. Current market price: $0.41 (foil $0.72), TCGplayer market prices via Scryfall.
As this land enters, choose Elemental, Elf, Faerie, Giant, Goblin, Kithkin, Merfolk, or Treefolk. {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a spell of the chosen type or activate an ability of a source of the chosen type.