Empath's Fetter

Your weapon becomes fueled by your own anxieties and fears. Make a melee attack against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects, while their mind becomes a tangled web of psychic trauma. Until the start of your next turn, if the target tries to move 5 feet or more the target takes 1d8 psychic damage, and the spell ends.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d8 psychic damage to the target on a hit, and the damage the target takes for moving increases to 2d8. Both damage rolls increase by 1d8 at 11th level (2d8 and 3d8) and again at 17th level (3d8 and 4d8).