Weisheng was exhausted. He didn't think finding the threshold for his powers would be so hard. He was lucky his misuse of power so far hadn't alerted the Heavens.
When he killed Meihui, the Goddess of Marriage, the right amount of power surged out, saving him from the slander of being the Supreme Demon Lord. So far, the people he had killed died with his secret, and it was all because of his fortune.
He rested his head on Xiaoling's shoulder as she wrote important points about their lesson on her study table to help as a reminder for Weisheng. Whereas he kept himself busy with plotting against the Heavens. Since he was learning how to control his powers, he reckoned it would be easier to get rid of Huizhong. He was a God of War and shouldn't be taken lightly, so Weisheng wanted to proceed cautiously.