White Knight Chronicles II

As Bronze Star introduced you to one skill set. For this you have to get a gold star icon next to each skill tree for your avatar, that means you have to have learned 100% of the skill points for each tree at least one time. In a sense, this trophy is designed for you to play all the skill sets available in the game. Since you do not get enough skill points to master all of them at-once, the way to accomplish mastering them all is through the “rebirth” process.

When you reach Level 80 (which is only possible to reach starting at Guild Rank 22), you can rebirth at Sinca Village. This location will appear in Van Haven Waste on the World Map once you have cleared the second campaign. By talking to the lone NPC, he will briefly explain the benefits of reincarnation. If you agree, you can revert your avatar back to Level 60. Where you will be refunded 400 skill points and continue to gain more until Level 80. The benefit to this is you will also gain another 40 skill points for each rebirth until your forth one, for a maximum of 760 skill points at Level 80. Not only making your avatar possibly more powerful, but also more flexible. So with this in-mind, you can master different skill trees during each rebirth and unlock this trophy by your 3rd one. It is also generally recommended to perform your rebirths as soon as you can.

The rebirth process can take several hours and even longer if you were to go through traditional methods of leveling-up again, since if you run with parties you get less experience points. A good method is to start this process once you get to Guild Rank 22. As the quest Vellgander: Section 2 becomes available at this GR once you have completed Section 1. This quest can be used as a solo opportunity to gain a lot of experience points and level-up in a few short hours if you utilize a class that has AoE attacks. You just need to clear rooms and find an elemental lord in a room. Clear the room, and kill the enemies that the lords will summon. Repeat this process until you get to Level 80.

There are other possible GR20+ quests to solo run at Level 60 to gain levels quickly, but this method is among the fastest.

If you have reached GR26 and still need to master skill stars for your avatar or if you ever want to do subsequent rebirths, there is a faster method available with the release of the Quibbles with Kibbles II DLC quest that is unlocked automatically when going online after patch 1.01. This can be performed with any class, as Yuchee explains this method: