Silent demon or Impossible demon

Silent demon is a demon that is really hard half of the people here can beat it silent demons have 4 spikes instead of 3 spikes and 6 mini spikes instead of 4 mini spikes and straight fly

impossible demon is a demon that is harder that silent demon it has 6 spikes instead of 4 spikes and 10 mini spikes instead of 6 people can only beat it with 4x speed maybe but sometimes impossible demons have 10 spikes instead of 6