I have no limit

The story begins with a strange phenomenon, strange portals appearing randomly all over the land, and these portals contain monsters. Each floor has a leader with distinctive abilities from one monster to another, and another phenomenon appeared, which is the acquisition of some people's strange abilities, and people called them Songeken, who enjoyed special abilities The protagonist is an ordinary person with no ambition or skill who is not even from Songeken, Leeong Tae-wa