Diamond Treasure Chests will also spawn/appear at any height in Creativerse-worlds on dark arenas with floors made of corrupted blocks - as long as enough corrupted blocks have been placed in one chunk (area) of the gameworld. (One chunk is 16x16x16 blocks large.) These treasure chests will only spawn in complete darkness, so adding roofs and walls to any spawning arena/farm will be of benefit, otherwise these chests can merely spawn at night. As of R25 (November 2015) Diamond Treasure Chests can contain: Advanced Extractors, Wood Burning Lamps, Iron Ore, Obsidian Rods, Iron Rods , Super TNT,