Many of the Eldar wear highly polished Waystones upon their chests. At the precise moment an Eldar dies, the wearer's soul becomes captured within this stone -- which is then known as a Spirit Stone. If the stone can be recovered, it is then customary for it to be taken into one of the Craftworld's bio-domes, where the soul is released into the Infinity Circuit -- the Eldar's source of eldritch energy, a place of rest, and sanctuary from the Warp. However, this is by no means the cessation of an Eldar's contribution to war, as under desperate conditions, an adroit Seer can be forced to withdraw a spirit from the Infinity Circuit and into a Spirit Stone once again. This newly imbued Spirit Stone can then be bonded with the wraithbone of a large robotic construct. The merging of an Eldar sou