The Dark Crystal
Urskeks were once a great race, but during the wake of the great light they were divided into two races, the Skeksis and the Mystics. The harmony of the world was shattered when the Skeksis cracked the dark crystal, a powerful gem that provides balance to the universe. After they awoke from the division, they were full of rage and anger. The other race, the Mystics, now filled with sadness, flee for the Valley of the Stones leaving the Skeksis to wage the Garthim War and destroying peace. The last remaining Gelflings, Jen and Kira, find each other and set off to fulfill a prophecy: they must find the missing crystal shard to repair the dark crystal to bring peace back to the world.