User Summary: The Underdoom Core Pack is part of Caverns Deep! Core packs contain the most commonly used terrain pieces, unlike the Adventure Pack which are unique pieces specific to an encounter area set. The Underdoom Core Pack the basic cavern pieces for Underdoom Encounter Area. It is made of "Dwarvenite". This item was initially available as an add-on for the Build Your own Cavern pledge level or included in one of the other pledge levels during the Caverns Deep! Kickstarter. The item is available in unpainted versions or in one of two different paint schemes –Cavern or Underdoom. Underdoom Pack comes with these 123 pieces: (4) Straight Bank (6) Curve Bank (4) Bank to Wall Left (2) Bank to Wall Right (2) Passage Ramp (2) 45° Turn Passage (1) Passage Intersection (1) Convex Corner (7) Diagonal Wall (2) Stagnant Puddle Floor (2) Straight Wall (1) Swell Wall Right (4) 1x1 Straight Wall (4) Cascading Pool Corner (9) Flat Floor (4) 1x2 Floor (4) 1x1 Floor (2) 1x1 Corner (2) Riser A (2) Riser B (1) Corner Entrance (1) 4x4 Convex Curve (2) Rising Wall Right (1) Arch Topper (10) Caverns Stilt 12mm (24) Caverns Stilt 38mm (2) Curved Natural Bridge Base (1) Hinged Natural Bridge Base (1) Cave Cliff Large Curve (2) Cave Cliff Concave Curve (1) Trifecta Long Swell Wall Right (1) Trifecta Swell Ledge Left (1) Trifecta Corner Wall (2) Trifecta Corner Ledge (1) Trifecta Large Curve Wall (3) Trifecta Large Curve Ledge (4) Ledge Wedge