Alastor's Phantom Chain

You link together fragments of spectral energy into a long phantasmal chain. This magic weapon lasts until the spell ends. It counts as a simple melee weapon with which you are proficient. It deals 2d4 force damage on a hit and has the finesse, light, and thrown properties (range 40). When you hit with this weapon you may force the target to make a strength saving throw or become grappled, in addition you may use your bonus action restrain the creature you cannot target other creatures for attacks with this weapon while it is restraining another. If you have advantage on your attack roll to hit with this weapon it does not require a bonus action to restrain. Grappled creature take an additional 2d4 Force damage when hit.

At Higher Levels. When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 3d4. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 4d4. When you cast it using a spell slot of 7th level or higher, the damage increases to 5d4