The Hollow Star Rib

This magical bow grants a +2 bonus to attack and damage rolls you make with it. While you wield the Hollow Star Rib, you gain darkvision to a range of 120 feet. If you already have darkvision to 120 feet or greater, add 120 feet to the range of your darkvision instead.

You can communicate telepathically with any willing creature you can see within 60 feet. You can cast Hunter's Mark at will.

The Bow has three charges, you can consume one of the charges to cast one of the following spells: Warp Sense, Detect Evil And Good, Invisibility The charges recharge at dawn.

While you are hidden or invisible, your attacks with this weapon deal psychic damage instead of any other kind of damage they would deal.

As a bonus action, you can roll a DC 16 Concentration check. If you succeed, attacks you make this round do not end your invisibility or reveal your position, if they otherwise would. If you fail, you can choose not to make attacks. Proficiency with a Longbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.

This bow was provided to Twilight's Call by Vraska the Mirekeeper in Khordreg Grul .

It's said that the bow was made from the rib of Kaelthar the Hollow Star.