Dragon Sand

Dragon Sand is found only in Grenh, an impassable desert land beyond the borders of Garlan. Grenh is a toxic wasteland, as the entire desert is covered in Dragon Sand.

Just one breath of the fumes from the sand is fatal, although the sand itself will dissolve tracelessly into most liquids. The victim does not perish instantly, but instead feels fine for two or three days afterward. Eventually their lungs grow red hot, their skin gives off smoke, and their body shrivels: the victim is burned from the inside out. There is no cure, making Dragon Sand a highly effective poison. It can only be stored in enchanted containers, as it would burn through anything else.

Related drugs: Deathwatch Spider Venom.

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Origin: The Eyes of the Dragon.

Dragon Sand The Eyes of the Dragon (Stephen King)