1. You must be at the level cap, no 200~250.
2. You talk to the rebirther (sp?) NPC, and he will tell you some hints about a certain monster, and that he's been dropping a certain item recently. He will say things like it has 5 legs, it floats and it's purple. It's octoplus. He will drop a rebirth ticket, and you have to gather 50~100 to make your rebirth.
3. Each rebirth you make, the harder it gets. E.g.:
First time: 50 RB tickets
Second: 150 RB tickets
Third: 250 RB tickets... And it goes on...
4. No low level monster, the monsters change weekily, or each 2 days, and sometimes it's even a boss, just no Zakum, Pap or Pianus, that would be too much lol...
Well that's it!