In addition to the Gods listed elsewhere, there are several minor mythological beings spoken of in current Western culture and may be taken more or less seriously. These are commonly called Kitchen Gods.
The Twilight Tunnels, the Imperial Gate system, were the backbones of the Imperium. The ability to travel almost anywhere via the Twilight Tunnels, allowing for near unlimited trade for little money, quick communication (any message anywhere nearly instantly (or within 3 days for the hinterlands), and easy personal travel. This system can be adapted to any gate system.
Food is Life. Food, what is eaten, when it is eaten, and how it is eaten, says a great deal about a culture.
Every culture has a different idea of what constitute’s breakfast. Even regions inside the same culture can vary quite a bit (like grits with hot sauce in Texas or Fishcake mix in omelets in New Hampshire). What do they consider “food” first thing in the morning in your space?
The Seeker was a mystic guardian from long ago. He was a hero and a companion to Greater Heroes. To ensure the Realms would be protected, he charged his apprentices to teach others.
BlenderofSixElement’s Way is the system of magick known to all the known world of Arth. There may be native minor magic systems, but the only effective system is BlenderofSixElement’s Way.
They were a very religious people, focused upon their leaving to the afterlife. They associated magical spirits/ gods with birds. It is difficult to determine if this was metaphorical or actual.
A magician develops a new way to make scrolls and can sell more powerful spells for cheap. Problem is, whether the magician is aware of it or not, the spell's power comes from spirits trapped by the magic that makes the scroll. Once used to power the scroll, the spirit is driven mad by the forces that have ripped through it's being, and often develops a homicidal thirst to destroy the one who tormented it. The spell the spirit was used for may have left some residual power in the spirit to give it more abilities than it ever used to have.