"Shit! Argh! Gah!" Shen Ze grunted nonstop as he was repeatedly sent flying by attacks from a Grade 3 System. Once the strongest cultivator part of Immortal's army, to an even stronger Hero after defecting to Mascot's side, Shen Ze had matured a lot.
But in the end, despite possessing power on par with a Grade 3 System, he couldn't win against them. Any injuries faced by the Systems could easily be healed through Mental Energy. Only a blow to their Core Skill was a threatening attack.
But even that could be solved as long as they simply revive. Moreover, even if they were to lose a level, they could instantly level up by absorbing the plenty of Mental Energy oozing out of the System World.
The war had already raged on for a century. By this moment, he had gotten damn tired. On the other hand, the Systems were the same as usual. As beings of the mind, they could function endlessly as long as they were supplied with Mental Energy.