Chopper suddenly said "I think I found something..." He looked up and said "Captain, did your pain start when you were in the moonlight?" Wolf nodded, trying to sit up. Chopper nodded and said "The shards are moon jade. They gather up energy in the moonlight. There will be tiny shards left over from the wound, in your blood. Those will fade and be discarded in a few days. But when your in moonlight, your pain is the unknown energy being drawn in by the moonlight."