Source: Arcana Unleashed - Deadfall
Staff, Legendary (Requires Attunement)
This weathered bone staff is topped with a skull and decorated with vertebrae. It can be wielded as a magic Quarterstaff that grants a +3 bonus to attack rolls and damage rolls made with it. While holding the staff, you have Resistance to Necrotic damage.
Aura of Haunted Power. As a Magic action while holding the staff, you can cause it to radiate supernatural power that fills a 30-foot Emanation originating from you. Creatures of your choice in this Emanation (including yourself) gain the following benefits:
Undead Deterrent. Undead have Disadvantage on attack rolls against the creatures.
Unholy Protection. The creatures have Resistance to Cold, Necrotic, and Psychic damage, and they have Advantage on saving throws to avoid or end the Frightened condition.
The Emanation lasts for 1 hour or until you end it (no action required). Once used, this property can’t be used again until the next dawn.
Illuminating Sight. As a Bonus Action while holding the staff, you can cause the eye sockets of the skull atop the staff to emit an unearthly glow; this glow lasts until you stop it (no action required). While the staff glows, it sheds Bright Light in a 15-foot radius and Dim Light for an additional 15 feet. Invisible creatures and objects are visible as long as they are in the staff’s Bright Light or Dim Light.