The Rebirth system allows you to create a stronger character then you had before. The 2nd rebirth is available for players who have fully completed their first rebirth.

After the second rebirth, you will again receive bonus stat points and attribute growth bonuses as well as upgrades to your resistance. You will, of course, also get to select you class, gender and build new avatars for yourselves after being reborn.In addition to all that, your characters name will be highlighted in purple.

2 Rebirth Insider

1)First rebirth must be completed first.
2)200 Reputation Points will be lost for a successful 2nd rebirth. Without enough Reputation Points rebirth will fail.
3)The second rebirth can be started once your character reaches level 120. You can also be reborn at level 124 and you will receive extra 8 bonus stats points for each level after level 120.
4)Players must learn skills from grade 1 to grade 4 and level these skills to 50.
5)Professional titles must be power leveled to the top grade and all five soul stones need to be collected.
6)Players must have a level 80 combat pet.
7)Players must complete all the rebirth quests.