Kakine Teitoku’s ultimate creation ability gave him as much time, resources, and physical strength as he wanted. He was the worst possible enemy for Accelerator and Mugino Shizuri who had instantaneous firepower in the form of explosive destructive power.
They would eventually reach their limit, they would eventually find themselves cornered, and they would eventually lose their lives.
Kakine Teitoku did not have to worry about when or where that eventuality occurred. He only needed to wait for its arrival no matter how long it took. He did not have to worry about his own consumption. If he merely waited for victory to come his way, his wish would be granted. It was the ultimate wastefulness, the ultimate laziness, and the ultimate desecration. The #2 had gained the ability to extend the idea of ‘sitting and waiting’ to a level where it threatened to bring humanity to extinction.

Toaru Majutsu no Index New Testament, vol.6 ch.7 pt.12