Antonin staggered a bit when Roddy's whirlwind first hit him. He laughed a little to himself; the Lestrange had already started using dark magic, just like Antonin had know he would.
It was unfortunate, Antonin thought, that he never had more ability with wind. It would have have irritated Roddy to turn the wind back on him. But, that was not to be. On the other hand, grass, dirt, and dust would burn, and fire was his to wield through years of practice. With a thought, Antonin ignited the debris cloud that was buffeting him. He took control of the fire, letting it wash around him, before absorbing it. Antonin reopened his eyes and smiled at Roddy.
Temporarily overcharged, Antonin channeled the power into the old magic, the wild magic, the pure black flame of dark magic he could control, and sent a wall of fire back at Rodolphus. It was almost like fiendfyre was under his direct control, burning a path of ground clean to fused dirt as the wall moved toward Rodolphus.