This staff, in the shape of gilded bone arm, with the hand clutching a glowing purple orb, was once wielded by the great archlich Vecna himself . Adorned with purple runes, this staff channels the combined energies of the negative plane, the Shadowfell, and the chaotic energy of the equally chaotic plane Limbo, where Vecna is rumored to live(or un-live) in a necrotic tower.

Evil presence. Any  good creature of a challenge rating/level of 7 or lower, has disadvantage on all saving throws if they are within 15ft of you.

Undying resistance. You have immunity to poison damage and the poisoned condition, and resistance to necrotic damage.

Spells. You can cast Cause fear at will. You have 20 charges, and can cast the spells with the appropriate number of charges. Here are the spells: Abi-Dalzam's horrid wilting(6 charges), Blight(9 charges), Create undead(11 charges), and Finger of death(12 charges). You regain all charges after you drink the blood of a creature you have slain within 1d4 hours.

Undying servitude. Once per day, you can summon 1d4 Wraiths. These monsters act after your initiative, and are under your control. The disappear after one minute, or until they are all killed.

Notes: Resistance: Necrotic, Immunity: Poison, Immunity: Poisoned, by a creature of evil alignment with the spellcasting or pact magic feature