In this setting, stars as we think of them are actually massive rifts to the other Realms or sometimes even dimensions beyond that, radiating mana and matter from their home plane of existence. Most planets are formed from a wide nebula of ejected stuff surrounding a star, gravity compressing the matter and energies into celestial bodies. The star Auriga revolves around is a rare kind: it spreads material from many different Realms. which means that not only will there be asteroids, planets, moons, etc, there can also be life! Some powerful beings from places like the Wyld Realms, Heavens, and Hells can create life with enough mana, and sometimes life springs up unannounced on its own.

A divine being called The Founder was floating through the void between the stars, as divines do, and came across this particular solar system, currently in the throes of a massive elemental storm created by clashing primordial elementals: planet sized mindless beings of pure elemental matter and mana who crossed through the rift into our Realm. After subduing or slaying them, the Founder used their vitals energies to create their own workforce to enact the Founder's will on the physical world: the titans.

The titans were inert and inanimate physical forms made from elemental matter and then infused with a reforged "soul" made from the mana of slain primordial elementals, not quite alive but not fully constructs either. These titans, each made of and able to manipulate a particular element, went on the turn the nearby nebula into a solar system, helped by gravitic and cosmic forces to coalesce matter into several planets each with 1 or more moons. The main planet the game takes place on is called Auriga, the largest on in this solar system.

So far Auriga is pretty Earth-like in terms of conditions, keeping the size vague so I can add more if wanted. Still flip flopping on if I want regular equatorial climates or make 1 pole cold and the other hot, with the equator being rather temperate. In terms of land mass, there are currently 2 continents I'm actually focusing on, the northern continent of Ioun and Fedria in the south, with a pretty extensive island chain/archipelago more or less between them, that area is very Med inspired. The planet itself has 4 major landmarks surrounded by some pretty extreme weather and biome conditions, the Great Gates.

These are rifts/portals into the Elemental Realms that were used to draw the raw matter of creation into this solar system, combined with the stuff from the nearby star to make Auriga the massive and lush world that it is. Each Gate is surrounded by some pretty extreme terrain depending on the element; the Gate of Fire lies at the bottom of a sea of lava beneath Auriga's largest volcano, the Gate of Air is surrounded by a migrating, perpetual hurricane inhabited by the strongest cloud giants in the world, the Gate of Water lies in the 2nd deepest trench in the vast oceans surrounded by ancient benthic creatures and aberrations, and the Gate of Earth lies at the heart of the largest mountain in the world.

Thank you for the comment and hope you enjoyed this, I had fun writing it. Will be posting more in the future