yesturday i both 3 armor type backup stones s-grade, at least item name is like that, but when i try to use it - nothing hapened, it was imposible to put stone in black box. so i checed description of item. ....item that rises a s-grade weapon enchant rate by 15%... as i know for weapon is 10% and for weapon stone image is diferent. ingame nick exorcist, items still in my inventory. hope it will not take long.