A dagger of defiance is a magical dagger, first created in Myth Drannor, that grants the wielder an immunity to fear and repulsion, and enables the wielder to more easily resist the effects of enchantments, charms, polymorphs and petrification. Such a weapon requires a standard dagger, doppleganger blood, distilled essence of xorn flesh, and the casting of fear and repulsion spells. As of 1368 DR, the value of such a dagger was around 1,000 gold pieces. By 1372 DR, this was around 12,000 gold pieces.