C667 The Green Crystal Drove the Mecha

"Yo, green?" Su Shengchen looked at the five small crystals in front of him and said in surprise.

The country named these high-leveled creatures crystal beasts according to the characteristics of the crystals in their heads, and the colors differentiated the differences between them.

Currently, Su Shengchen knew three types of crystals, green, red, and yellow. According to this classification