There are 10 different types of Anomaly Class ranging from Class 1 (easiest) to Class 10 (hardest). Class 1 =Hideaway or Drone Cluster (easiest) Class 2 =Burrow or Drone Collection Class 3 =Refuge or Drone Assembly Class 4 =Den or Drone Gathering Class 5 =Yard or Drone Surveillance Class 6 =Rally Point or Drone Menagerie Class 7 =Port or Drone Herd Class 8 = Hub or Drone Squad Class 9 = Haven or Drone Patrol Class 10 =Sanctum or Drone Horde (hardest)