As the Thunder Beast approached, it saw an orca laying horizontally in the shallow waters, forty meters in length and covered with thick black armor all over its body.1

The Single-horned Orca had gone through a significant transformation this time. Not only did its entire body turn black, but the fins on its back had also turned into horn-like structures, with rows of triangular dorsal fins running down its back to the tail. At the same time, the small fins on its abdomen had become long and big, giving off an illusion of wings that could spread out to fly.1

In addition, its head, which used to be relatively smaller compared to a blue whale, had become wide and massive, and its slightly opened huge mouth resembled a black hole.0

Plus, the slightly upturned single horn on its head made the Orca look even more domineering and ferocious, with a slight resemblance to a Kun[1].2

Or perhaps the ancient gene activated this time was that of Kun....0