"Seven Thunders" is one of the four Lost+Found styles.
Martial Style This style can complete a Harmonic Combo. The Seven Thunders is one of the oldest styles, and parts of its techniques can be seen in use all over the Jade Empire. However, these clumsy imitations are but pale shadows of the true power of this style, which is combining a chain of seven attacks that are designed to hit sensitive targets one after another in a certain order that will drop nearly any foe in seconds. The onslaught of thunderous strikes has been known to temporarily debilitate a foe unlucky enough to withstand all seven strikes and remain standing.
The first part of the video shows Seven Thunders in its inital state. The second part shows this style with damage and speed maxed out.