Dark Mode (BETA):

Awakened weapons are only available for level 56+. Your Black Spirit will give you the quest and you must kill the Harpy Queen boss to collect your weapon. The boss is not solo-able from what I’ve seen, it looks like it takes at least 20 people to take it down. I’m not totally sure about the details because I haven’t been able to try it myself, but once the boss is defeated you should get your weapon from your Black Spirit and a separate tab on your skill tree will be unlocked with your new skills. Below is a video of the Harpy Boss fight.

I do believe that the Sorceress class has a different quest altogether where they must kill a variety of mobs to receive their weapon from an NPC. The costumes are a cash shop costume and do not come with the new weapon.

For anyone else who is interested, KR recently revealed the Ranger Weapon Awakening and you can view the post about it here:

Ranger Weapon Awakening!