As soon as Aciel took a deep breath, neutralized his energy and recovered his strength, he actually couldn't take it anymore. He held it in, when his mouth tasted sweet, it was blood, his true energy was not yet perfect. Aciel raised his arm to wipe his lips in slow motion so that everyone wouldn't see it, especially Alger who was standing in front of him far away with a happy expression.
Alger's last attack was indeed extraordinary, although Aciel was able to withstand the attack and return it but it required tremendous energy. Aciel had to suppress his true energy as hard as possible in order to counter Alger's attack. Even if it worked, who knows if Aciel tried his best to restrain it, Alger's attack energy slightly injured his soul. No one could see it but Aciel felt it and Alger too could actually only guess, but he really wasn't sure.