Antolin used binding magic that could stop the time. To be simple, all the people were inside the red magical barrier the only people that could move. Also, the thing here Antolin could freely move his body inside that seemed can could match the huge speed that the masked guy had.
Moreover, Yumiro was spitting some blood out of his mouth, enduring the severe pain that came from the twenty slices on his body. He was just lucky that he had a vast amount of health power since if an ordinary adventurer experienced this, he could easily tell that it won't survive.
Even though he was facing a perilous situation, still, Yumiro had a malicious smile on his face knowing that no one could see their battle right now. One thing went to his mind and it was to use the [Core devourer] skill so that he can regain the health power lost to him instantly.