Space Slug

The Space Slug is a giant slug that lives above the system of Arvandor. It provides warmth and light to the planet in a daily cycle and is the origin of Arvandor's atmosphere.

Origin
The Slug is an adult member of a species that exists throughout space. Their lifespans are incredibly long, up to billions of years.

Appearance
From the planet, the slug's underside is so big that it encompasses the whole sky. It has a daily cycle in which it generates light and warmth for 16 hours at a time, before going dark and producing less warmth for another 8. During the day, the underside appears to look like a mixture of oranges, reds and blues, looking similar to a sunset on Earth. During night, as its glow fades, the glow of its eggs becomes more apparent, looking like stars to the inhabitants of Arvandor.

Life Cycle
The slugs begin as an egg, filled with water, Ifos, and other nutrients. When a male slug comes near the eggs, it can fertilise them. These fertilised eggs, after a period of gestation, eventually hatch in a galactic scale explosion. This explosion releases the excess Ifos and water, and the slug begins its life.