Blooming Clematis

The user's entire forearm is entirely encased in a compact core of reinforced muscle, then encased in 3 layers of drill made of bone, then finally encased in a special metal secreted from the muscles themselves to the entire outside. The bone is strengthened (through compression and its plaited spiral shape) to become the hardest type of bone the body can produce. Using their muscle, the user can rotate the drill at extremely high speed, several hundred revolutions per minute, and extend the rotating drill with enough force to pierce completely through steel. This drill is also capable of firing rotating, fast moving Metal Tendon Bone Spears in rapid succession.