Elemental Crystals

The four Elemental Crystals are key items in the story of Kingdom Hearts: Distant Bonds. They represent the four elements; green representing Earth, yellow representing Air, red representing Fire, and blue representing Water. They are actually the four spherical crystals from Twilight Town's Struggle Trophy, which have found their way to Annwn. They are scattered across the regions of Annwn, and The Dark Entity forces Llew to gather them. It is revealed at the end of Kingdom Hearts: Distant Bonds that they are the key to unlocking the world's Keyhole, which in turn connects Annwn to the Darkness and Kingdom Hearts.