Curse Technique: Death Controlling Joined Rings

The user forms a circle of Yang release chakra underneath them, which quickly shifts to their back. Upon making physical contact with the opponent. a circle appears under their feet, synchronizing it to the opponents chakra signature and latching onto their shadow. If they move away from it, it will quickly follow them until its within their shadow or right under them. As long as the opponent stays out the circle, they can't be hurt my the user inflicting damage on themselves, though it requires the opponent to constantly be moving, as the circle formation treats the targets shadow, air, water, and other objects as a surface itself. Dimensional travel won't allow them to escape either, as the formation is latched to their shadow and chakra, going wherever they travel. The circle will last no less than 30 seconds and no longer than 4 minutes before disappearing. The two circles are connected, so if the user hurts themselves while the target with within the circle or the circle is within their shadow, they will suffer the same injuries.