Maximilian ignored the comment, though not because he wanted to hide the details of his card, or keep his secrets close to him. He just hadn't recovered from the intensity of the fight yet.
Never in his life had he been so focused on anything before, and never had he reacted under such immense pressure - even if he was the one putting himself under pressure. It was to the extent that he genuinely seemed unable to process the fact that enemies had stopped coming, and kept searching for any signs of approaching berserkers at all.
It was only when Nero slapped him on the back that he woke up from his state of hyper focus, and even then it took him a few seconds to remember what was happening.
He then looked at Nero, who seemed to lack a single wound on his entire body, and was not showing even the slightest signs of exhaustion. He tried to understand how exactly Nero was so strong, for he hadn't shown anything that special.