1765. Ecstatic
Noah had to transform Isaac's law, but he didn't want to remove the reason that made it interesting. At the same time, he had to give it a different purpose, something that matched his existence.
The kills were a feature that Noah wanted to keep. They matched his existence perfectly, but he couldn't make that requirement too general. The ability would lose power otherwise.
Noah didn't have something as specific as Isaac. He didn't have a specific enemy to target when rebuilding the ability. However, he could pick something that he had done often and respected his ambition.
Noah had spent his entire life fighting and defeating opponents that had a higher cultivation level. The potential of his ambition depended on his logic-defying achievements, so he could do something similar for his new ability.