Nyan ability to fit anywhere is such a visually pleasing power.
A hero being effective is so rare in this manga I expect Nyan to come alive next chapter or escape.
Well, since now, pretty much every S class hero has been effective. The only monsters that can put up a fight and maybe even win against an S class are only dragon level and some high demons, and they are very rare. Even A class are supposed to be very effective, because if you think about it, the extreme majority of monsters that appear in the world are always tiger level at best, it's just that we don't see them.
Btw, after seeing this fight, personally, i don't know if i would rate Nyan as a dragon level. I mean, i don't know… dragon is supposed to be near Boros or Orochi level, and while i could see that with other cadres like Black Sperm, Homeless Emperor, Overgrown Rover and others, i don't really see it with Nyan. A single class S hero (unless it's Tatsumaki or Blast) shouldn't be able to kill a dragon level threat like Drive Knight did with Nyan, it seemed too easy. Even Puri Puri Prisoner, who is still supposed to be the weakest of the S class, didn't have that many problems with Nyan, thanks to the Bristle Armor.
UNLESS..... Nyan is still alive....