Legendary Weapons

Each class has a special quest, starting at lvl 19, and continuing in intervals of 10 lvls after that. It is an FB, where you go inside of a cave/dungeon/whatever and inside are mobs, around your level, but a lot harder than others of that level. At the end of the area, there is a boss. That boss has a chance to drop a mold. Molds are used in making legendary weapons. The boss that drops the specific mold you are looking for, is the boss inside of and FB19 Dungeon, and Im guessing has maybe a 1% drop chance(really not sure). Your best bet is to just save up and buy one from the Auction House, normally being 300-500k from there.