Kanturu

Kanturu runs on its own cycle, with no set time: it goes through states, one after the other, and starts over on its own. There are three maps, and each one is a stage.

What you need to bring

It is not a ticket — it is equipment. The game checks four things at the door, and refuses in silence if any is missing:

You need Detail
Moonstone Pendant equipped in one of the two ring/pendant slots, and with durability — in the warehouse or inventory it does not count
Wings, Dinorant or Fenrir something in the back slot. Without it you do not get in
No Horn of Uniria the Uniria on your back blocks entry
Not transformed a transformation ring active prevents it

The most common mistake is the first one: people have the Moonstone in the inventory and think that is enough. It has to be worn.

Where the Moonstone comes from

It drops in Kanturu 2, at 0.20% per kill — and it is the only place in the game that drops it. Kanturu 1 and 2 are ordinary maps: you can hunt there without being in the event.

So the path is: hunt in Kanturu 2 until the Moonstone shows up, equip it, and then go in.

The three parts

Map What it is
Kanturu 1 monsters level 80 to 129
Kanturu 2 where the Moonstone Pendant drops
Kanturu 3 the event part, and where Gemstone drops

What it gives that the others do not

Gemstone only drops in Kanturu 3, and only during the event. It is what becomes the Jewel of Harmony — see socket and harmony.

There is no other source. If you want Harmony, this is the way.