Electrokinesis: Complementing his Thunder Breathing, Kaigaku's Blood Demon Art allowed him to generate actual lightning from his flesh and blood, which is colored black and blue (sans Fifth Form: Heat Lightning, which is red and black). His electric attacks crack and rend his target's flesh while burning it, greatly augmenting the lethality and offensive capability of his attacks. The bleeding caused by the electricity nearly destroyed Zenitsu's eyes and severely injured him after their fight, leaving him in need of Yushiro's immediate aid to save his life. Kaigaku used his Blood Demon Art to great effect, combining his lightning with his Thunder Breathing techniques to enhance his attack range and speed, which even Zenitsu had trouble keeping up with. It is implied that this Blood Demon Art helped make up for Kaigaku's inability to perform Thunderclap and Flash.
Techniques
Second Form: Rice Spirit (弐にノ型かた 稲いな魂だま, Ni no kata: Inadama?) - Kaigaku delivers five, consecutive, arching lightning slashes in quick succession in a single breath.
Third Form: Thunder Swarm (参さんノ型かた 聚しゅう蚊ぶん成せい雷らい, San no kata: Shūbun Seirai?) - Kaigaku rapidly circles around the enemy and assaults them with a series of wide, arched, lightning slashes from all directions, surrounding them in a series of afterimages.
Fourth Form: Distant Thunder (肆しノ型かた 遠えん雷らい, Shi no kata: Enrai?) - Kaigaku charges forward at high speeds and releases a multitude of electric slashes in a single sword strike.
Fifth Form: Heat Lightning (伍ごノ型かた 熱ねつ界かい雷らい, Go no kata: Netsu Kairai?) - Kaigaku takes a stance and and swings his sword upwards, electrocuting his target with lightning which is red-and-black in color.
Sixth Form: Rumble and Flash (陸ろくノ型かた 電でん轟ごう雷らい轟ごう, Roku no kata: Dengō Raigō?) - Kaigaku unleashes a horizontal slash, which releases a series of powerful long-ranged lightning attacks. The multitude and range of these bolts makes the form difficult to evade.
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