What is the key to Titan's trip to Japan?

The key to a day in this game is in the grave.

According to official website, a Titan mission game, players who collect fragments can get the sun key, provided that 6 fragments are collected. Another way to get it is through the tomb of Aijimius in the upper left corner of Nin site in Tesak.

The Titan Mission is based on the fairy tale of Titan, with the background of ancient Greece and Rome. Game * * * has four scenes of game content. Players need to complete various main and auxiliary tasks to gain experience value, upgrade, learn skills and add task attribute values, and also need to obtain corresponding equipment during the task completion process. Players eventually need to beat Titan on the top of Olympus to win.