Nightmare Light

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I don't care how weird it is, as long as it keeps darkness away.


Nightmare Lights are light sources found within the Ruins. They cannot be opened or destroyed with a Hammer. Instead, the amount of light they emit depends on the current state of the Nightmare Cycle that the Ruins are in; the more extreme the magical state, the more the Nightmare Lights open up.

Nightmare Lights drain the player's Sanity when they are open and if the player is near. The actual magnitude of the drain depends on how much light is coming from the Nightmare Lights (how "open" they are). During the Warning phase they will drain 600 sanity/min, while in the Nightmare phase they will drain 900.

Shadow Creatures will appear around the lights, even if the player is not insane. The Shadow Creatures only appear during the Nightmare phase and are hostile to the player. Once the Nightmare Cycle is completely over, the creatures will die, dropping Nightmare Fuel in the process.

The lights are fueled by Nightmare Fuel extracted from unknown depths below. This is a major example of the excessive use of Nightmare Fuel by the Ancients that led to their downfall.

Nightmare Fissure

Nightmare Fissures are objects that appear in the Ruins and rarely in Caves, more specifically, on Stalagmite Terrain. They act identical to Nightmare Lights. Depending on the phase of the Nightmare Cycle, they emit more or less light - the greater the light radius, the higher the chance of spawning Shadow Creatures

Each fissure can only spawn one creature, either a Terrorbeak or Crawling Horror. If the player has been detected by either one of these mobs, all other Terrorbeaks or Crawling Horrors in the vicinity will become solid and will be able to attack the player in a group. Once the fissure is closed, the first spawned Shadow Creature will automatically die, and the other ones will become neutral, assuming the player has enough Sanity. 

Nightmare Fissures will reappear at the same location after a period of time. It is advisable to put a Sign or other item with a Map icon near these fissures to mark their locations, since these are the best places to find Nightmare Fuel.

Open Nightmare Lights.

Placeholder.png Trivia

  • Nightmare Fissures were introduced in the Six Feet Under update.
  • Sometimes, Nightmare Lights and Fissures will open during the Calm State. During this time, they will emit blue light instead of red or pink light.

Blueprint.png Gallery