Binding Tether

You conjure a chain or thread of radiant light or inky darkness that lashes at a creature in range, forcing the target to make a Wisdom saving throw. On a failed save, the target takes 3d10 radiant damage (if you are good or neutral) or 3d10 necrotic damage (if you are evil) and is tethered to you for the duration of the spell. On a successful save, the creature takes half as much damage and suffers no further effects. While a creature is tethered to you, it takes 3d10 radiant or necrotic damage at the start of each of its turns and it cannot move further than 30 feet away from you or teleport. A tethered creature can repeat the saving throw at the end of each of its turns, ending the effect on a success.