Chakra Nail

The chakra nail is a jutsu create by Shigai Daija, originally used for puppet making and in his craft for more persist cuts and carving. Shigai however learned that it was a quite efficient weapon when he slipped and the nail went right through a table. Since then he attempted to find a way to make this relevant in his fighting style. He finally realized that by putting the nail on a spot where the blow would connect would allow him to pierce the opponent rather than bluntly hit them, the best part being it would be hard to see coming.