Dungeon Bricks

Dungeon Bricks are a non-craftable type of Brick from which the Dungeon is constructed. On world generation, one of three colors of Dungeon Brick is chosen to create the entirety of the Dungeon. Dungeon Brick is one of very few block types that is impervious to explosions. A Nightmare Pickaxe or a Deathbringer Pickaxe or better is required to mine it.