After a summoner reached level 5, leveling up wasn't as simple as leveling up.
Instead, it required the summoned spirit to reach the same level, and at the same time, the synchronization rate of spirit and energy had to reach a certain limit before one could advance at the same time. Otherwise, one could only remain at the same level.
However, the difficulty of advancing in level depended on the summoned spirit's innate talent. The higher the summoned spirit's innate talent, the more difficult it was to advance.
At this time, other than breaking through one's own strength, one could only rely on external forces to break through. This gem was one of the types of treasures used for a breakthrough.
"This kind of item is generally called a promotion treasure. However, this gem is not an ordinary promotion treasure." Yan Wuyue showed a confident smile.
