Yuanmen is very humane to the contestants, for fear that we don't know anything on the first day, they sent ten Yuanjing to each contestant.

The crystal is about the size of a finger and transparent. The middle-aged man told us that this is Bai Yuanjing. In addition, there are red and black crystals. On the island of Yuanmen, one hundred white crystals can be replaced by one red crystal, and one hundred red crystals can be replaced by one black crystal.

I put Yuanjing in my pocket and asked Cao Da what to do next.

Cao Da frowned and said, "From the mission released by Yuanmen, team formation is...