Kaido>> random dragon stop the horse shit, it stinks lls. If he was there he would've been boil alive right along with oden. He probably only got scarred cause he was bored/drunk lls
It was summoned through Uranus, the dragon horn as Uranus is the God of the sky. Ryuma solos ancient weapon who is stronger than Kaido.
Of course its true as Ryuma's worshipper can scar Kaido without even making a black blade, Ryuma one shots this clown.