Crystal of Kadavus
The Crystal is a fist-sized, diamond-like gemstone that is cut to resemble a skull. When using the proper incantation and exposing it to the light of a full moon, it focuses dimensional forces. When this focused beam is aimed at a magical item, it is completely restored to full power (even if the item had previously been drained of its magic powers or "destroyed"). This procedure must be repeated for at least 2 nights of the full moon before the item is restored to full power.