Remnants of Powerful Experts
Travelling through the ancient battlefield, Xuan Hao also felt that the restrictive power had grown stronger and had started to forcibly supress his power. Luckily it did not take him long before he discovered that he could use the Dao of Corruption to negate this suppression.
The only problem was that it would be harder to negate the stronger the suppression grew. Although he could keep it from affecting his strength for now, he also understood that if the restrictive power continued to grow stronger, he would not be able to stop it from negatively affecting his strength!
At the very least, the ancient battlefield was devoid of life, and he didn't have to worry about having to fight any demon beasts. The only real thing he had to look out for so far, was the remnant energy left behind by the powerful cultivators who had once fought on the ancient battlefield.