Shadow dust is an alchemical ingredient in The Witcher that can be obtained from killing nightwraiths and devourers.

Source

• The Tome of Fear and Loathing, volume II.

Notes

• Devourer remains will not contain this dust without their bestiary entry.
• After speaking with the blacksmith and his wife in Chapter IV, during the secondary quest Temptation, you will be tasked with collecting 9 shadow dust.
• It can be neither bought nor sold by anyone.