The few surviving Light Yellow Threat monsters were doing the same as Katrin and Osana - they were watching Adam and Nessa try their best to deal with Plague Reaper.
Nessa was able to escape the black air with her powerful breath capable of causing a storm, but... it did not affect whether they would win or not.
Once Adam recovered from Plague Reaper's attack, their fight took the shape it should have.
Nessa and Adam attacked from all sides of their enemy, trying to overwhelm Plague Reaper.
A few minutes ago, Plague Reaper had tossed Adam aside to keep him out of this situation, but now he didn't need to do that.
Throughout the fierce fight and intense pressure, Plague Reaper had taken a few wounds from both Adam and Nessa, but this was happening less and less often with each passing second.