Twilight

The twilight is an ominous shroud that is trying to devour the land of Hyrule in hopes of the King of Twilight, Zant to turn whatever light is left in the world into shadow, allowing his people to freely live outside of the Twilight Realm. Zant, takes away the light from the "Light" oracles/bearers that maintains the light of Hyrule in different regions, and by taking these away.. twilight is able to take over the land in a somewhat "paint-filler" way. Anything that dwells within twilight appears to be, "Spiritual Orbs" and Link, being one that bears the Triforce of Courage, is one of the few that is able to stay in a solid form (wolf).