Note: I'ts better that you have read at least once The Rainbow Factory FanFic, at know the SCP Foundation (For better understanding of the story).....
"After the explsion of the facity in Cloudsdale, Atmosphere started to search revenge for what happen there on the clouds....he promised to himself that he would brutal murdered all of the Main 6, the Princess and he would finally take the crown of equestria, all for himself...."