Death dust is an alchemy ingredient in The Witcher that is obtained from the bodies of wraiths, nightwraiths, noonwraiths and barghests.

Source

• Barghests
• Specters, Wraiths, and the Damned
• Physiologus

Notes

• Neither wraith, nightwraith, noonwraith nor barghest remains will contain death dust without that monster's Bestiary entry.
• Kalkstein requires four portions of death dust in Chapter V.
• Neither bought nor sold by anyone.