aion gold, aion kinah, buy aion gold, You need to talk with 3 of them and then you get the Treasure key in game

After you kill the boss, there is an altar at the back of the room. When you click it the dungeon will be over and you will be teleported back aion gold out. Make sure you get our chests (if you have picked up keys along the way).

There are 3 possible keys (red, blue, green). Each key has a different series of box to click before you can open the chest room. The location of the chest room is between the Mutant Record and Researcher.

Key Quest: To start the hidden key quest you need to obtain one key. There are 3 kinds of keys: Mutant Key Red, Mutant Key Green and Mutant Key Blue.

Those keys are drops from monsters inside FT; every normal monster can drop it. Sometimes no key will drop and sometimes you will get more than one (depend only on luck). The best way is to kill all monsters in the whole dungeon.

Now after you got a key you need to find the correct boxes. You need to talk with 3 of them and then you get the Treasure key.

Mutant Key Red:

First you need to click on the box which is at the beginning (Entrance).

Next box is in the tunnel after the Nebsite room.

Last box is in the Nebsite room.

Thanks to Hideo for the FA screens and thanks to nEx00n for the WI screens.