1. Sara 1. Tank Knowledge 2. I can not take this quest. See reference image here: http://gyazo.com/7dd394dd3dbd003b60b989358ddbaa33 2. Theodora 3. Inseparable 3. I finished this Quest about 10 months ago. One of the rewards was "[Buff] Ultimate Weapon", or something. I've seen this Buff has disappeared. It is possible add to my Inventory the new "[Buff] Piercing Bullets", since I can not do the Quest again. See reference image here: http://gyazo.com/a5fed334b1bb6c9a844d3f2efa28cb0d 3. Celine 3. Hunterized. In this Quest counter Hunter's killed (0/30) never advances. It Works ?. I've killed over 30 hunters with melee weapons. See reference image here: http://gyazo.com/d5dad674e543391a619eb12f825b73ac 4. I heard there is a Quest to enable slot "Buff Unique". But I have not found. See reference image here: http://gyazo.com/62eea98dc5a64446101d9fb4fc406cca Thanks for your time.
1) Locked for everyone for some unknown reason. 2) The buff has been temporarily removed due to it being ridiculously overpowered. I guess it might return later when it gets better balanced. 3) Bugged for everyone. 4) There is no quest to get the Unique Buff Slot. It is only obtainable via certain major events, e.g. the most recent event being the Halloween event.