Caelus

**Caelus** is a subworld introduced by the Deimos, the Starborn Princess addon that can be accessed through the Q.C.S.T.T.. The subworld consists of many structures within an empty world, containing many useful Crafting materials and Ores.

The subworld generates once and will not regenerate. However, when the subworld is entered various structures will be spawned in empty spaces, with new structures being able to generate as you progress.

Liquids, items, and falling blocks will stay in place in the subworld and gravity is the same as the top of the space layer. Touching the bottom border of the subworld or using a Magic Mirror will bring you back to the main world.

## Contents

Harpy
Meteor Head
Wulfrum Pylon
Wulfrum ScouterWulfrum Scouter
**After defeating The Hive Mind/The Perforators:**

Aero Slime
**In Hardmode:**

Astral Probe
Astral Slime
Aether Valkyrie
Shockstorm Shuttle
Sunskater
Wyvern
**In Godseeker Mode:**

Asura
Cosmilite Slime
Primordial Hell Spawn
Primordial Ice Spawn
Primordial Impact Spawn
Primordial Light Spawn
Primordial Wither Spawn
Side Mollusk
**After defeating Providence, the Profaned Goddess, The Starborn Moth, Empyreon, and The Devourer of Gods:**

Rust Slime
**After defeating The Fabricational Quartet:**

Exo Obelisk
Exo ScouterExo Scouter
**After defeating the Mechanical Horde and La Ruga from The Exosphere:**

La Ruga
**After defeating the Vision of the Tyrant:**

Primordial Rainbow Slime (Miniboss)
**Bosses:**

Aetherial Guardian, Olistene | **From Fishing:**

Enchanted Starfish
**From Fishing in Godseeker Mode:**

Side Gar
**From Cosmic Elementals:**

Bone Sword
Starfury
Enchanted Sword
Arkhalis
Cosmic Stone
**From Meteor Heads in Pre-Hardmode:**

Meteorite
**From Wulfrum Pylons, and Wulfrum Scouters:**

Wulfrum Metal Scrap
Energy Core
Wulfrum Battery
**From Aero Slimes:**

Aerialite Ore
**From Astral Probes and Astral Slimes:**

Stardust
**From Shockstorm Shuttles:**

Essence of Sunlight
The Transformer
**From Shockstorm Shuttles and Sunskaters in Hardmode:**

Essence of Sunlight
**From Astral Slimes after defeating Astrum Aureus:**

Abandoned Slime Staff
**From Astral Slimes after defeating Astrum Deus:**

Astral Ore
**From Asuras and Side Mollusks:**

Exodium Cluster
**From Cosmilite Slimes:**

Cosmilite Slag
**From Primordial Hell Spawns:**

Orb of Surt
Core of Chaos
**From Primordial Ice Spawns:**

Core of Eleum
Orb of Myst
**From Primordial Impact Spawns:**

Orb of Crystal
Core of Rend
**From Primordial Light Spawns:**

Orb of Law
Core of Sunlight
**From Primordial Wither Spawns:**

Core of Babil
Orb of Zot
**From Rust Slimes:**

Strange Matter
**From Exo Scouters and Exo Obelisks:**

Exo Prism
Exo Core | **From terrain:**

Aetherium Brick
Aetherium Brick Wall
Cloud
Cloud Wall
Compressed Mana
Copper Ore
Crimtane Ore
Demonite Ore
Dirt Block
Endoplate
Ice Block
Ice Wall
Iron Ore
Gem
Gold Brick
Gold Brick Wall
Gold Ore
Hazard Chevron Panels
Hazard Chevron Wall
Hellstone
Laboratory Panels
Laboratory Panel Wall
Laboratory Pipe Plating
Laboratory Plate Beam
Laboratory Plate Pillar
Laboratory Plating
Laboratory Plating Wall
Lava
Lead Ore
Life Crystal
Mana Crystal
Meteorite
Mud Block
Platinum Brick
Platinum Brick Wall
Platinum Ore
Rain Cloud
 Shimmer
Silver Ore
Snow Cloud
RendplateRendplate
Stone Block
Stone Wall
Tin Ore
Tungsten Ore
Water
**From terrain after defeating The Hive Mind/The Perforators:**

Aerialite Ore
**From terrain after defeating Skeletron:**

Arsenic Ore
**From terrain in Hardmode:**

Astral Ore
Cobalt Ore
Essence of Babil
Essence of Chaos
Essence of Crystal
Essence of Eleum
Essence of Law
Essence of Myst
Essence of Rend
Essence of Sunlight
Essence of Surt
Essence of Zot
Palladium Ore
Stardust
**From terrain after defeating Cryogen:**

Cryonic Ore
**From terrain after defeating one mechanical boss:**

Brimstone Slag
Charred Ore
Mythril Ore
Orichalcum Ore
**From terrain after defeating two mechanical bosses:**

Adamantite Ore
Titanium Ore
**From terrain after defeating Calamitas:**

Depth Cells
Lumenyl
Tenebris
**From terrain after defeating Golem:**

Abyss Gravel
Scoria Ore
**From terrain after defeating Ravager:**

Life Ore
**From terrain after defeating the Lunatic Cultist:**

Meld Blob
Nebula Fragment Block
Solar Fragment Block
Stardust Fragment Block
Vortex Fragment Block
**From terrain in Godseeker Mode:**

Cosmilite Slag
Exodium Cluster
Luminite
**From terrain after defeating Providence, the Profaned Goddess:**

Bloodstone
**From terrain after defeating The Devourer of Gods:**

Darksun Fragment
Endothermic Energy
Nightmare Fuel
**From terrain after defeating Jungle Dragon, Yharon:**

Auric Ore
**From terrain after defeating the Vision of the Tyrant:**

Pitchblende
Primordial Ore | **Furniture:**
Laboratory Console
Laboratory Containment Box
Laboratory Display
Laboratory Door
Laboratory Electric Panel
Laboratory Screen
Laboratory Server
Laboratory Terminal
Luminous Altar
Reinforced Crate

### Structures

#### Life Crystal Planetoids

Life Crystal Planetoids from the main world can generate uncommonly in Caelus.

Gem
Gold Brick
Gold Brick Wall
Life Crystal
Platinum Brick

#### Ore Planetoids

Ore Planetoids from the main world can generate uncommonly in Caelus, with extra ores.

Copper Ore
Crimtane Ore
Demonite Ore
Dirt Block
Iron Ore
Gold Ore
Lead Ore
Platinum Ore
Silver Ore
Stone Block
Tin Ore
Tungsten Ore
**From terrain after defeating Skeletron:**

Arsenic Ore
**From terrain in Hardmode:**

Cobalt Ore
Palladium Ore
**From terrain after defeating one mechanical boss:**

Mythril Ore
Orichalcum Ore
**From terrain after defeating two mechanical bosses:**

Adamantite Ore
Titanium Ore
**From terrain after defeating Ravager:**

Life Ore
**From terrain after defeating the Lunatic Cultist:**

Meld Blob
**From terrain after defeating Providence, the Profaned Goddess:**

Bloodstone
**From terrain after defeating Jungle Dragon, Yharon:**

#### Stars

Star shaped structures can generate in Caelus with 5 distinct variants; one with a crust of Meteorite filled with Compressed Mana that generates at any time, one with a crust of Stardust filled with Astral Ore that generates in Hardmode, one with a crust of Brimstone Slag filled with Charred Ore that generates after one Mechanical Boss has been defeated, one with a crust of Abyss Gravel filled with Scoria Ore that generates after Golem is defeated. and one with a crust of Astral Ore filled with Meld Blobs that generates after the Lunatic Cultist is defeated.

Meteorite
Stone Wall
Compressed Mana
**From terrain in Hardmode:**

Astral Ore
Stardust
**From terrain after defeating one mechanical boss:**

Brimstone Slag
Charred Ore
**From terrain after defeating Golem:**

Abyss Gravel
Scoria Ore
Water
**From terrain after defeating the Lunatic Cultist:**

#### Meteors

Meteors are structures that consist of Meteorite and Hellstone, They can also contain Bloodstone after Providence, the Profaned Goddess has been defeated.

Meteorite | **From terrain:**
Hellstone
Lava
Meteorite
Stone Wall
**From terrain after defeating Providence, the Profaned Goddess:**

#### Comets

Comets are icy structures that consist of Ice Blocks and Water. After Cryogen has been defeated, water can be replaced with Cryonic Ore. After Calamitas has been defeated, they can contain Lumenyl, Depth Cells, and Tenebris in their center if it contains water.

Ice Block
Ice Wall
Water
**From terrain after defeating Cryogen:**

Cryonic Ore
**From terrain after defeating Calamitas:**

Depth Cells
Lumenyl

#### Clouds

Clouds are small structures that generate towards the bottom of Caelus. They can contain Aerialite Ore after defeating either The Hive Mind or The Perforators.

Cloud
Cloud Wall
Rain Cloud
Snow Cloud
Water
**From terrain after defeating The Hive Mind/The Perforators:**

#### Orbs

Orbs are small circular structures that can generate in Caelus in Hardmode. They are entirely composed of various crafting materials.

Astral Ore
Essence of Babil
Essence of Chaos
Essence of Crystal
Essence of Eleum
Essence of Law
Essence of Myst
Essence of Rend
Essence of Sunlight
Essence of Surt
Essence of Zot
Stardust
**From terrain after defeating the Lunatic Cultist:**

Meld Blob
Nebula Fragment Block
Solar Fragment Block
Stardust Fragment Block
Vortex Fragment Block
**From terrain after defeating The Devourer of Gods:**

Darksun Fragment
Endothermic Energy

#### Luminite Planetoids

Luminite Planetoids can generate in Caelus in Godseeker Mode. They can also include Cosmilite Slag, Meld Blobs, and Lunar Fragment Blocks. After defeating the Vision of the Tyrant, smaller planetoids can rarely generate towards the top of the subworld made up of a crust of Pitchblende filled with Primordial Ore. Primordial Rainbow Slimes can spawn at these planetoids.

Primordial Rainbow Slime (Miniboss) |  | **From terrain in Godseeker Mode:**
Cosmilite Slag
Exodium Cluster
Luminite
Meld Blob
Nebula Fragment Block
Solar Fragment Block
Stardust Fragment Block
Vortex Fragment Block
**From terrain after defeating the Vision of the Tyrant:**

Pitchblende

#### Aetherial Diamond

The Aetherial Diamond is a small hollow diamond shaped structure of Aetherium Bricks that is filled with Shimmer. The top of the structure has the Luminous Altar, which is used to summon Aetherial Guardian, Olistene. The structure will generate in the center of the subworld.

Aetherium Brick
Aetherium Brick Wall
 Shimmer | **Furniture:**

#### Caelus Bio-center Space Station

*Main Article: Arsenal Labs*
There is a large unique Caelus Bio-center Space Station that generates higher up in the subworld. The structure does not contain Schematics or Draedon's Logs but it contains many useful items in locked chests that can be opened as you progress.

Endoplate
Hazard Chevron Panels
Hazard Chevron Wall
Laboratory Panels
Laboratory Panel Wall
Laboratory Pipe Plating
Laboratory Plate Beam
Laboratory Plate Pillar
Laboratory Plating
Laboratory Plating Wall
Lava
RendplateRendplate | **Furniture:**
Laboratory Console
Laboratory Containment Box
Laboratory Display
Laboratory Door
Laboratory Electric Panel
Laboratory Screen
Laboratory Server
Laboratory Terminal
Reinforced Crate

## Breath

Caelus will drain your breath meter as if you were in Water. The subworld ignores items that grant permanent underwater breathing through a gills effect, such as the Gills Potion, Neptune's Shell, Effigy of Decay, Amidias' Blessing, and the Aquatic Heart.

### Breath loss rate

The following items reduce how frequently Caelus takes breath away from the player:

* A full set of Victide armor: +5/**3**
* Amidias' Blessing: +7/**2**
* Diving Helmet, Diving Gear, or Jellyfish Diving Gear: +10
* Arctic Diving Gear or Abyssal Diving Gear: +20
* A full set of Reaver armor: +25/**20**
* Abzu: +14
* The Absorber: +15
* Abyssal Diving Suit: +39
* A full set of Tarragon armor: +40/**30**
* A full set of Bloodflare armor: +50/**37**
* Alien Carbon Fiber Fabric: +30
* A full set of God Slayer armor or Silva armor: +55/**40**
* The Sponge: +25
* A full set of Auric Tesla armor: +75/**65**

### Housing

If the player is within a closed perimeter of solid Blocks that is completely filled with background Walls, they will stop drowning and will begin to regain breath. The player can sleep and set their spawn in the subworld and various light sources including normal Torches and most Lamps, Lanterns, and Candles will only work in breathable housing.

## Notes

* The player is granted unlimited flight while in the subworld.
* While in the subworld, enemies and the player will receive no effects from the following status effects:

* The subworld will transition as your altitude increases. Caelus is the same width as the main world and is roughly 10% shorter.

* Martian Madness events will occur in Caelus and the main world.

## Trivia

* The theme that is heard while in Caelus is Space.
* The subworld is a reference to Near Terrarian Orbit from the SGAmod.