Tail of the Spine Gnasher

This long, flexible tail resembles the spine of a massive creature, entwined with dark leather and etched with jagged bone patterns. While attuned to this item, you gain a +1 bonus to your AC. Additionally, as a reaction when a creature within 5 feet hits you with a melee attack, you can launch the tail to lash out at them. Make a melee attack against that creature using your spellcasting modifier, dealing 2d6 piercing damage on a hit and forcing the creature to make a Strength saving throw (DC 15) or be knocked prone. You can use this feature three times, and it regains all expended uses on a long rest. Once per long rest, you may also summon a spectral tail of the Spine Gnasher to attack as a bonus action, which lasts for one minute or until you lose concentration (as if concentrating on a spell). This spectral tail acts as a melee weapon with a +1 bonus to attack and damage rolls, dealing 1d8 piercing damage. Additionally, when you use the spectral tail, any creature that begins its turn within 5 feet must succeed on a Wisdom saving throw (DC 15) or be frightened until the end of its next turn. This fear effect can only trigger once per turn per creature.