Attack on B-Cyclone is the second level in the Cyclone Stages. It appears every Wednesday.
Black Cyclone will first appear in this level, along with black-themed enemies.
Nyandam appears as support.
Many anti-black cats are Ubers, which makes this level harder if you do not have those anti-black ubers. Otherwise, fight this level as if it was Attack on W-Cyclone. However, the Nyandam does not do anything unlike THE SLOTH in Attack on W-Cyclone.