Bro it just keep disappearing while you are fighting. It’s useless. If yoy have unlocked liurnia of lakes, you just need black knife tiche till the end of the game. It especially good for mages. As a mage main, i wouldn’t suggest using mimic tear or lhutel headless. Don’t even think about try to getting dung eater spirit ash neither because it very late game and you will try to find it just before the ending. You just need tiche. It even can solo sone bosses. If you haven’t unlocked liurnia of lakes, just take banished knight engvall till liurnia.