Cerebral Bros
Combo A
Bullet Bore
Bullet BoreEffect
If the player also has 
Cluster Mine , 
Bow , 
Charmed Bow , or 
Explosive Rounds , Bullet Bore turns red and fires two drills at a time.
Bullet BoreIf the player also has Cluster Mine , Bow , Charmed Bow , or Explosive Rounds , Bullet Bore turns red and fires two drills at a time.