Valley of Oblivion is a dungeon in Wild Arms 4 northeast of Frontier Town Halim. The party ventures to this location in search of a Holy Root, an item that will purify the town's polluted water. At the very end of this dungeon is a beautiful, lush Eden with a large tree where the Holy Root can be found. The BGM that plays throughout this dungeon is Shadow Territory (Disc 1, Track 18) and the track that plays at the end of the valley is Green Tracks.