Sierra

After killing for ten minutes straight, Arkhen frowned and stopped using his skill as he felt a tiny amount of exhaustion. 'Is there a way to remove this mental exhaustion? I can't use skills constantly despite having unlimited primal energy.'

[Unfortunately, that's not possible. Mind and soul are the core, and the system lies in the connection between them. You can only enhance your mind and soul by breaking through to the next limit or encountering some valuable high-rarity resources that can enhance your mind and soul slightly and evolve them in a unique way.]

'Oh well, let's do some exercise then,' Arkhen said as cracked his hand knuckles and blurred in the eyes of other as he dashed with his fastest speed and started killing the rest of the red dots with his hands and kicks.

"KILL HIM!" someone shouted after seeing that Arkhen stopped using his supernatural power.

All remaining gangsters and criminals stopped running around and instead jumped onto Arkhen.