How to get the skin of Dajisunta Star Source?

In the glory of the king, players who participate in the Tower of the Sun will be rewarded with energy crystals at the end of each game, and the higher the number of layers, the more rewards. After accumulating 1350 crystals, players can exchange colorful tails of skin parts of Daji Xingyuan in the crystal exchange ceremony of the Sun Tower.

Now that the activity is over, the Sun Tower will no longer produce crystals, so there will be no crystal exchange activities.