The Excellyon are magic gemstones, usually worn as pendants, that allow a Mage of the Element they represent to suffer no harm, even when hibernating for an Age or more. They were made by Pike Bronwen for Ryker Slade to aid his takeover of the world by allowing him to simply sleep until the Mage bloodlines had been sufficiently weakened through intermarriage with non-Mages.

Bronwen made one stone for each of the Arch Mages.