Serpent Hood

Wondrous item, very rare (requires attunement)

While you wear this scaled hood, you have advantage on stealth checks and, as a reaction, you can make a bite attack against an opponent that moves within 5 ft. of you, whether or not it has disengaged. The attack uses your choice of Dexterity or Strength and does 1d4 piercing damage plus your ability modifier. While wearing the cloak, you are considered proficient in bite attacks.