Talk:Fate Slicer/@comment-82.80.135.165-20181008060629/@comment-25669516-20181008065309

Neither. Don't waste shadow energy to upgrade weapons. Save it for later chapters or, if you must, upgrade armor instead.

Also note that Fate Slicer will be removed from booster packs and chest drops in chapter 4 so the only way to upgrade it is with shadow energy or shop (and shop will be very expensive ).