User Summary: The Uncharted Underground is part of Caverns Deep! The Uncharted Underground is a complete kit with multiple subcomponents to build each of the following encounters in Caverns Deep! – Ice Catacombs, Crystal Caverns and the Underdoom. The Adventure Essentials series makes use of Universal Packs to reduce the number of needed pieces to build each encounter. It does not contain enough pieces to build all the encounters at the same time. It is made of "Dwarvenite" and includes some metal and magnetized parts. Some parts have LED circuitry (switch, battery, and socket) to support LED lighting attachments. This item was initially available as a pledge level levels during the Caverns Deep! Kickstarter. The item is available in painted and unpainted versions. Uncharted Underground contains the following subsets: Ice Catacomb - Core Pack 12 Ice Catacomb - Adventure Pack 12 Ice Walls Pack Stone Banks Packs Ice Catacomb - Terrain Trays Stalagmite Pack Epic Ice Pieces Passage Transition Pack Crystal Cavern - Adventure Pack 13 Crystal Caverns Epic Elements X2 Crystal Caverns Walls and Corners X2 LED Wall Pack The Underdoom - Core Pack 14 The Underdoom - Adventure Pack 14 Cave Door Pack Villain Pack Misty Gateway Pack Stairway To Violence Vile Mushroom Pack x2 The Underdoom - Terrain Tray Passage Transition Pack Trifecta Terrain Pack X2 LED Wall Pack Hollow Elevation Blocks x2 Entrance Riser Pack Stalagmite Pack x2 Natural Bridge Cave Cliff Pack x2 Double Door Pack Driftstone Pack