Ryu wouldn't fall so easily, a single hit in the face was nothing to fear and, despite being somewhat inexperienced in fighting, he wasn't scared to get hurt if it meant surviving.
However, he was facing ill odds and the only thing he could use now was his cursed sword.
Ryu grasped his sword as if his life depended on it and let out all the energy he could muster. He didn't think on what would happen afterwards, he didn't think on saving some energy to recover his stamina or health, all he had to do was land one decisive blow to end the fight in one movement.
The sword absorbed Ryu's energy as fast as he was able to expel it, transforming the blue colored light into a darkfire that seemed to come directly from the abyss.
Stefan's jaw was about to hit the floor, the dark energy started surrounding Ryu completely, it wasn't like anything he'd seen before and despite knowing himself stronger he couldn't keep himself from shivering in fear.