Golden Chest
From Dungeon Defenders 2 Wiki
Gold Chest is series of bonus in Forest Biome map.
After game ends there is chance that a text: A Golden Ingot Has Spawned will appear and golden ingot will spawn on one of many veins of gold in caves and can be gathered and bring him to Forge to forge him to golden key, which can be used to open Golden chest in secret part of map, that drop 2 equipments.