Pictured here is a Larothan priest painting a glyph of protection onto the side of a granary. The people of Laroth believe that such glyphs protect the contents from harm. The blue square is meant to ward of poison, plague and rot; the red square prevents fire- which is deadly in the water-scarce desert; the yellow square defends from the wind, sand and other environmental elements; and finally the white square is meant to hold an additional blessing, decided by a prayer said by the priest while painting it. These additional blessings are often things like protection from war, theft, and other such human-caused problems.

Larothan granaries are small square buildings, usually separate from other buildings, with the grain being kept in a pit inside. Flooding is almost nonexistent in Laroth, and the most common pests can fly, making keeping them suspended mostly unnecessary.

This was inspired by this post from r/worldjerking about the fire diamond being a magic system, and specifically the comment from u/DanDaManatee about a cargo cult.

Eren B is a Mars-sized moon that orbits and is tidally-locked to a Jupiter-sized gas giant. It has been partially terraformed however it still is a pretty hostile environment and has no native life. The people living on Eren B have regressed to a late medieval- renaissance level of technology after the fall of humanity's interstellar empire (the reasons for which I haven't figured out yet)