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The Blood Chamber is a large structure that is generated on world creation, located within the Caverns. Only one Blood Chamber is generated per world. It is composed of Stone Slabs, Tall Gates, Obsidian Lanterns, Obsidian Chandeliers, and Demon Campfires, with special Bat Pots littered throughout that drop Healing Potions, Mana Potions, Flaming Arrows, and Silver Bullets when destroyed. In the center is a Blood Altar, which allows the player to summon the Viscount at the cost of 5 Unholy Shards.



  • The Grim Pointer, sold by the Confused Zombie, points towards the center of your world's Blood Chamber, allowing it to be easily located.


  • Fixed Blood Chamber not spawning in some cases.
  • Introduced.
Surface Layers Forest • Desert • Ocean • Snow biome • The Corruption • The Crimson • The Hallow
Underground Layers Aquatic Depths • Cavern • Dungeon • Ice biome • Underground Desert • Underground Jungle • Underground Mushroom • Underground Hallow • The Underworld
Mini-Biomes and Structures Blood Chamber • Floating Island • Granite Cave • Jungle Temple • Marble Cave • Meteorite • Spider Cave