Ether Whip

Wondrous item (whip), legendary (requires attunement)

This magical whip has the power to strike into the Ethereal Plane, making it the bane of the incorporeal Undead. When wielding the weapon, you can use it to make attacks against creatures in the Ethereal Plane that you can see. You gain a +2 bonus to attack and damage rolls when wielding the whip. The whip deals an additional 2d6 force damage on a successful attack against an Undead. By attuning to the whip, you become proficient with it whether you are proficient with whips or not.

The whip has three charges. By expending a charge, you can cast see invisibility with the casting time shortened to a bonus action. At dawn each day, the whip regains 1d4 ? 1 charges.