Kaiju no. 8, 4

A large group of Kaijus attack the Tachikawa Defense Force base from the sky, but thanks to the efforts of the troop, the residual Kaijus are repelled. Hoshina, for his part, releases all of his power and seems to have resolved the battle against the main Kaiju, but then the main Kaiju transforms into an abyssal Kaiju before his eyes. Kafka's sensory capacity also reacts to "that being". What kind of monster does he turn into...?