Thunder Slayer

The Thunder Slayer is a powerful lightning technique created by Arashi.

Description and Effect
To use this technique, Arashi directs a large amount of lightning to his dominant hand, which is great enough that it becomes visible. Arashi then uses Shape Transformation to mold the lightning into a dragon's head, and then discharges the technique into his target. The Thunder Slayer is powerful enough to be fatal upon contact with a person, hence the name. Arashi can also use the technique to penetrate even the most robust of obstacles.

Drawbacks
Despite its formidable power, the Thunder Slayer has two significant drawbacks. Similarly to the Chidori, the Lightning Slayer expends a significant amount of chakra. Due to Arashi's below-average chakra reserves, he could only use the technique once a day in Part I, and his limit has increased to an unspecified number in Part II. However, he was severely fatigued after using the Thunder Slayer three times consecutively.

The technique's second drawback is that it has the tendency to backfire on the user, making it extremely dangerous if used without the proper level of skill. Arashi experienced this firsthand, when he attempted to use the Thunder Slayer to electrocute Azoku, but the lightning was discharged into himself instead. By Part II, however, Arashi has claimed to have complete mastery over the technique.