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 swamp witch that, when she dies, a huge black worm burst from her corpse and tries to burrow into the nearest living creature to use as a new host. If the the worm is injured in-between hosts smaller black worms swarm out of any wounds and burrow into anything living.