Each time the feathers of the Demons Destruction Wings scattered, they would fire haphazardly. Basically, they could hit a target within a ten-meter radius, beyond that, it was all up to luck.
Of course, if there were other enemies nearby, they too would be unintentionally attacked. This skill was most suitable for chaotic battles, but its effect might be uncertain if there are many allies nearby.
The feathers shot out swiftly and were nearly microscopic, making them extremely difficult to defend against. Although their attack power wasn't high, they were very painful. How painful? Ask Du You.
Why was Du You attacked by the feathers? Because he willingly proceeded with the experiment without any protection.
After suffering that initial shock, Du You took the precaution of putting up a defence before proceeding with subsequent experiments.