Needless to say, the next skill requires the previous skill level. This is a bit complicated to say. . . )
For example, Xue Jian started as an earth curse. When Xue Jianda reached about level 9, 10, the earth curse reached level 4. You will learn to fly stones automatically.
It's warm and foggy, haven't you used it? This skill cannot be used in combat. You can use up all his blue when Jing Tian is about to upgrade. Almost ~