Sumi’s Mankai had a large number of giant mounted canons. It was focused
on firepower output.

As Sonoko mentioned, it had the ability to fly.

Sumi floated towards Leo and unleashed hellfire upon it.

—Incredible… This is Mankai~

With a power able to flatten a mountain.

The giant Vertex, unable to withstand it, collapsed into the depths of the sea.

(WaSuYu Chapter 8, 8)