Yggdrazen

## The Yggdrazen

### Atmosphere composition

73,4% nitrogene23,2% Oxygene1,2% Argon0,08% Carbon dioxyde1,4% Others (Water vapor, Halogenes, Organic compounds)

The Yggdrazen is the modern Novan home-world. Its an artificial world with the shape of a ship. Its the only permanent Novan territory along with Sanctuary.

### Conception

Carved of a massive block of sarronite, the Yggdrazen has in insanely thick hulling, reaching dozens of kilometers thick in the finest part.

On four level, each of about 300 kilometer wide per 750 kilometer long surface topped with 105 kilometers of atmosphere and a "false-sky" that replicate sun light.

Various vertical opening allow the movement from a level to another with atmospherics fields avoiding the pressure variations in between "layers".

Each level has a different climate as the ship has its own water cycle. Water vapor forming cloud within each level, but liquid water being able to be drained to lower levels. The lowest level take the shape of an oceanic world, most of its surface is deep underwater. The second level is highly humid, the third temperate and the fourth dry.

Each level has a specific landscape but they follow the same idea, they regroup areas of various altitude and temperature allowing to recreate very different biomes.

Aside from "main levels" are also small areas enclosed in the walls of the ship that serve as training grounds and offers much more hostile and different kind of environments from volcanic to toxic and sub-zero blizzard hell.

The ship has blast doors to close the few openings. But they
were only used once in the whole ship history, most of the time they remain opened even when the ship is under attack. Right behind the
atmospheric force fields, there’s large open fields allowing in
atmospheric battle. The first Novan army is generally easily dealing
with attackers.

It has historically no known weapons to protect itself in a space battle, instead it use its sturdy hull stand like a besieged castle until the gigantic Arc-Drive allow him to jump to an unknown location.

## Arcanic contamination and arcanium roots growth.

### Root system

It has been observed on natural praximus world that the core was connected to the rest of the world by a system of pillar and lattice made of pure arcanium. Thus, this miniature praximus world has been given a low grade arcanium system that is called "the roots". This system allow the transportation of information, energy and matter as arcana. It was unpredictable that the system would at some point start to grow on its own, the most used roots increasing in size without any conscious action of the praximus.

### Arcanic alloy mutation (Herka's effect : Saronite mutation)

A lack of long-term experience on the effects of very-high intensities Etherius emission on arcanic alloys led to a conception flaw.

When built, the thickness of saronite separating the Yggdrazen core from the habitable area was ten time enough to absorb every emissions. But after all the centuries of permanent functioning, it appear that the E radiations transformed the Saronite into Leukrite (Leukrish-metal) in a great area around the core, but also in a minor measure, around active roots. The Leukrite itself was transformed in close vicinity of the core into Zhinite (Living-metal).

Those transformation, while they are valuable parts of the development process of Yggdrazen's core, lower the E absorption around the core. Resulting into the arcanic contamination of the areas nearing the core.

(insert graphic of the areas)

### Etherius contamination

The following table allow you to gauge the safe time period one can spend in each zone without proper protection or treatment.

(By T4 are considered Soul-forgeds, Archivist, Terraximus, Broodheirs, Archymancers)

Linked the to