The Iron Wind is the Ninth-World term for clouds of dangerous nano spirits, that are far too tiny to see, which travel across the landscape in terrible clouds borne by strong winds. These warp everything they touch, transmuting all matter.
An Iron Wind storm twists the ground, turns rock into clouds of vapor, and creates new features out of thin air. And woe to any living thing caught in its passing. Trees become rocks, pools of water, or unrecognizable lumps of pulsing, living substance. The Iron Wind tears apart creatures only to rebuild them in bizarre, seemingly random shapes. Flesh is transmuted to nonliving substances, ropy tendrils, or even more alien configurations or textures. Nine times out of ten, this transformation results in the death of the creature—sometimes a long, painful death as it tries to cope with its new form.