Knowledge of the Planes is quite limited in Zarthuga. Not many have travelled outside the Material Plane, and lived to tell of it, in the short timeline of the setting.
But, the demons and devils invading in the War of the Swarms, must come from somewhere, so must elementals etc. Spellcasters are especially aware of this “problem of external origin”.
There is some awareness around the inner planes, but much less of the outer planes. Most Gods spend some of their time in the Inner planes, seldom bringing their actual, killable bodies, to the material plane:
- Alfheir came riding in, most likely from the Feywild. With a certain “Feywild memory loss” applied to all who travelled this way (the Archelves).
- Misandri - Demi-god of the Wilds and Freigr - Demi-god of Fertility probably also reside in the Feywild
- Grend - God of Conquest and Jazi - Goddess of Fear probably reside in Shadowfell
- Sirena - Goddess of Depth and Crustloc - Demi-god of Madness most likely step in and out of the Plane of Water.
- Sol - God of Hope and Zorth - God of Bravery can probably step in and out of the Plane of Air and Fire.
- Midgond - God of Craft is believed to spend some of his time in the Planes of Earth and Fire.
- Gjerthr - Goddess of Growth spends time between the planes of Water and Earth, also holding back the plane of Ooze.