A mineral responsible for refrigeration, arctic landscapes, and hot springs across the world.
Part of my series on pseudo-magical world building
An elemental substance of tremendous purity and power.
A continent is home to large, leathery flying beasts with a wingspan of over 70ft. Though shy, herbivorous and easily scared, it is possible that an enterprising person could domesticate them. They would be useless in war due to their timidity, but excellent if used for commercial air travel.