Talk:Equipment/@comment-213.205.229.146-20140312192037/@comment-91.154.14.158-20140314051900

If you mean the last stone, after void stone (it's called spiritstone)

It's used for crafting the best set armors  and weapons in the game. You can unlock the Saintly set on level 70. The weapon and armor is tier 100. As far as I know,, the only way to obtain anything better is by topping the ranks in bloodmatch.