1. There is magic that exists as an ever present force that is strongly connected to life and allows willpower to manifest in a tangible form.
2. There are psychic powers from psychokinetic energy that is produced by spirits and intelligent lifeforms.
3. Living things have life force similar to chi attacks in martial arts fiction that can be potentially cultivated and manipulated.
4. Subtle matter exists throughout universe but intangible to everyday matter and makes up spirits.
5. There are multiple parallel dimensions and pocket dimensions, mainly based on mythological otherworlds.
6. Fauna/Flora of the world include some extinct animals and plants as well as mythological creatures of folklore.
Cosmology
The true origin has been lost; various religions say it was created by their deities. One of the earliest say the world was created a deity as a material reflection of the realm that divinities form to serve as a bridge to the parallel spirit realms.
Principal Geography & Features
Arcane Realm is mostly Earth-like with a few additions such as more wilderness and small villages and less concrete urban development, tropical rainforests are more common. There is a large cold plain called the Mammoth Steppe where most large mammals roam and various "stone forests" where islands actually float in the air. There are various reefs in the oceans including those made by coral, sponges, calcareous algae, and rudists. And the ice desert region contain the only cryovolcanoes on the planet. There are are villages and cities set up in large tree systems, cliff sides, and even underground.
Initial Active Setting
The earliest stories will take place on the continent of Dinillahi and its neighoring continent, Tianxia.