Electromagnetic Avatar Mode

Electromagnetic Avatar Mode (電磁化身モード, Denjikeshin Mōdo) is the empowered state Kei is able of entering. Due to merging with the ancient chakra within the Kiba swords, he was able to obtain a more powerful height of lightning power. By combining this power with excess amounts of electromagnetism or the lightning energy from the Bashōsen, he can enter this mode: an empowered state brought about by the mixing of electrical and electromagnetic powers. This has become more and more natural for Kei to enter.

Achieving
Upon convincing the beast within the Kiba swords that he was an ally that appreciated its true power, he merged chakras with it through transfer, effectively absorbing the swords and being able to manifest them whenever as they were revealed to be electromagnetic energy.

TBA

Trivia

 * Images from Laxus Dreyar of Fairy Tail. Credit to creators of Fairy Tail anime and manga, as well as zerochan artists.