Enhanced weapons are some of the most powerful items in MU, but they can only be equipped by tier 4 character classes. Your character becomes a tier 4 character class after completing the 4th Class Upgrade quest. You'll want to start using these items as soon as you've become the 4th class. You'll need to upgrade a Bloodangel item several times in order to obtain an enhanced weapon. NPC Priest James has an item shop, in Elveland, where he sells Bloodangel weapons in exchange for Ruud. Ruud is mostly obtained from mini-games, such as Maze of Dimensions, after becoming a tier 3 character class.