It’s a dragon that’s an armor of nothing.

The 3rd volume Luke Manga comes out May 2nd, 2022, which highlights with the final battle with Yuga, and comes with:

虚撃龍ゼロガイギアス Kyogekiryuu Zero Gygias (Void Strike Dragon Zerogygias/Imaginary Strike Dragon Zerogygias)

It costs 506 Yen per volume!