Barrage of Ravens

The user forms a string of two handseals summoning a massive number of ravens around the opponent from every direction forming somewhat a whirling formation as they are circling around the opponent forming the shape of a tornado made of ravens, because of the massive number of ravens the opponent's vision is completely blinded from seeing the user or anything around him in a range, on the user's commands via chakra, all of the crows change their course and fly towards the opponent from all directions piercing him and cutting his skin as well as feasting on his flesh by their strong beaks.