By the time the first contestant reached the 47th floor, three were eliminated, leaving only 18 inside the Red Tower. In addition to 'X', Maktis, who's Xyktia, also caught up and they started competing for the lead. The 16 others were on the 46th floor, where things got really bloody.
Arthur fought Amtir again and managed to kick him out of the tower, though he had to hit him two consecutive times with his sword, which consumed a great deal of energy and sucked a lot of his life essence. While he can recover it with time and Life Magic, the backlash was even a parasite like him couldn't resist.
He felt incredible dizziness and fatigue which greatly slowed his movements and rendered him vulnerable for a few minutes. Using an expensive defensive formation and the body of the Black Turtle, Arthur was forced to receive the joint frontal attacks of Leo and the Saber Saint, who teamed up and clearly wanted to take him down.