Thornbow

Weapon (bow), rare (requires attunement)
  Unseelie fey – those with a love for the cold and ugly facets of the world – cultivate the malevolent syklthorn, a green-brown creeper with bright red thorns. Syklthorn is a carnivorous plant that snatches creatures who venture too close before eviscerating them with it’s blade-like thorns. Weapons made from this plant are just as blood-thirsty.
  This magic weapon has 6 charges and regains 1d4 + 2 expended charges daily at dawn. As a bonus action, you can expend 1 charge to cause a thorny arrow to grow from the bow, choosing whether it is a Bramblestrike or Splinterstrike arrow.
  • Bramblestrike. On a hit, this magic arrow deals the weapon’s normal damage and the target must succeed on a DC 15 Strength saving throw or become restrained by magical vines for up to 1 minute as per the ensnaring strike spell (no concentration required).
  • Splinterstrike. On a hit, this magic arrow deals the weapon’s normal damage and then erupts in a storm of splinters and thorns. Each creature within 5 f eet of the target must succeed on a DC 15 Dexterity saving throw or take 1d10 piercing damage.
  Overgrown. As an action, you can expend 3 charges to cause three, thick-limbed, thorny arrows to grow from the bow and fire them at a point within 120 feet of you. Where the arrows land, a mass of syklthorn brambles grow creating an effect identical to the wall of thorns spell, dealing 4d6 damage instead of the spell’s normal damage.
  Uncommon variant: The weapon has 5 charges and regains 1d4 + 1 charges. Remove the Overgrown property and decrease all DCs to 13.
  Very rare variant: You have a +1 bonus to attack and damage rolls made with this magic weapon. The weapon has 7 charges and regains 1d4 + 3 charges. Overgrown deals the normal damage for wall of thorns. Increase all DCs to 16.