Project Skyfall, Project Speed Prison, and Project Malevolent Kitchen. These were the three domain projects that he had decided to embark on.
One domain hampered power by dumping the weight of the sky on them and every movement they made.
Another domain hampered speed by having the heavens themselves oppose speed and agility by exponentially empowering drag force and the drag coefficient within the domain.
The final domain cooked his opponent inside and out, bypassing durability and putting them on a time limit before they would eventually die from having their brains boiled, something that not even Martial Seniors could survive.
In addition, this domain served as a decent counter to freezing Martial Art that were extraordinarily lethal, even for him. Perhaps he could create a domain for that specifically when he had the time.