Dante's eyes go wide, geez he wasn't expecting that much power... Ice covers the man despite the burning winds swirling around him, for a moment he's simply entirely still inside of the ice... Until flames suddenly begin blazing from the red blade in his hands, his skin would transmute to something more like scales as a series of spikes pointing out. grow from his back, something akin to fins grows on his shoulders, a set of claws can be seen on his feet, and his head is that of a fish-like beast covered by a "helmet" that's just more spikes pointing behind it. The fires grow and grow, finally ending in him standing in a puddle of melted water and steam as he looks over at Delta.
"Gah, you're strong as hell clearly... Are you even human man? Or is this the part where ya bust out a Devil Trigger of your own on me?"
In contrast to his words before, by this point Dante seems impressed with such a display. He'd quickly rush over to his foe, a blur of motion that few could see, let alone keep up with. The elements of his blades trailing behind him as he moves, he'd toss the blue one behind Delta, a whirling cyclone forming on it and sending the thing rushing right at the man's back in an effort to knock him forward. With the red sword in hand, Dante slams it forward in a great gout of flames. An upper slice from the weapon sending a huge wave of fire blasting toward Delta, only to meet with the winds in the middle and become even larger for a moment as it's fanned, if also causing it to burn away faster and leave neither attack behind when he's done.
"Phew, wasn't expecting to bring out something like this, but damn if I'm not glad to see people worth fighting!"