Effects: Witchers coat their silver blades with Argentia, which increases the effectiveness of silver, but weakens steel blades.

Preparation: The oil is made by mixing ingredients providing two measures each of quebrith and hydragenum, and one measure of rebis; top-quality grease must be used as a base.

Duration: Long

Silver brings ruin to all beasts, but even a brave knight bearing a silver blade may not have the strength to defeat the most dreadful monsters. There is a way, though, to awaken the spirit of a silver sword - by using the moon oil known as Argentia.