Lightning Release: Lightning Beast Tracking Fang

By manipulating lightning chakra into their hand, the user can make the lightning expand to create the form of a hound. The hound remains connected to the user's hand, allowing them to control it during its attack.

Trivia

 * Raijū is a mythological creature in Shintō religion, companion to the Shintō god of lighting, Raijin. Raijū has many common representations, with a white and blue wolf sometimes engulfed in lightning being among them, akin to the form Kakashi's technique takes.
 * In Naruto Shippūden: Ultimate Ninja Storm 4, Kakashi can only use this technique if Lightning Cutter is selected as his Ninjutsu attack, as this technique serves as the Lightning Cutter's charged Ninjutsu attack in the game.
 * In Naruto Shippūden: Ultimate Ninja Storm Revolution and Naruto Shippūden: Ultimate Ninja Storm 4, this technique is used in conjunction with Might Guy's Daytime Tiger as part of their Eternal Rival Combination Ultimate Jutsu.