User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-21371438-20141016212052/@comment-24867901-20141017010140

Actually Extreme monster could make that virus-circle(like Goa or Shagaru) where you could walk in and get infected, but I only have fought village Extreme Seruregios so I didn't get to  tried Chaos magala weapon.