Burrows - Accessories Pack is part of the Dungeon of Doom series. It is made of "Dwarvenite" and includes some metal and magnetized parts. The Spikes Floor Insert is made with Dwarvenite G. This item was initially available as an add-on pack during the Dungeon of Doom Kickstarter. The item comes in both painted and unpainted versions. Burrows - Accessories Pack comes with these 17 pieces: (1) Dirt Floor Insert (1) Rocky Pillar Floor Insert (3) Web Floor Insert (3) Spikes Floor Insert (3) Egg Sacs Insert (1) Surface transition hole (2) End Cap (1) 2x4 Breached Wall (2) Fire Ant Warrior