Cupun Witch of Orcus

Spellcasting. The Witch is a 13nth-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 17, +9 to hit with spell attacks). Zecharian can cast disguise self and invisibility at will and has the following wizard spells prepared:

Cantrips (at will): Acid Splash, Light, toll the dead

1st level (4 slots): witch bolt, False life, Inflict Wounds, shield

2nd level (3 slots): ray of enfeeblement, Shatter, Gentle Repose

3rd level (3 slots): summon lesser demons, animate dead, vampiric touch

4th level (3 slot): Phantasmal Killer, ice storm

5th level (2 slot) [Tooltip Not Found], cone of cold

6th level (1 slot)  create undead,  summon fiend

7th level (1 slot)  finger of death

Undead Thralls. When the Witch casts animate dead, it can target  one additional corpse or pile of bones, creating another zombie or skeleton, as appropriate. Whenever the lich creates an undead with a necromancy spell, its hit point maximum is increased by 13 and adds 4 to its weapon damage rolls.

Slave of Orcus. The Witch gains the following features for being a Slave of Orcus 

Undying Soul (Recharges after a Short or Long Rest). If this
c reatu re is reduced to 0 hit poi nts, it immediately makes a DC
10 Constitution saving throw. lfit succeeds, it is instead reduced
to l hit point.

Aura of Death. This creature emanates a deathly aura that
extends 30 feet in every direction from its space wh ile it isn't
incapacitated. The aura is blocked by total cover. While in the
aura, the creature and any friendly undead are immune to the
frightened condition and have resistance to radiant damage.
Enemies suffer disadvantage on death saving throws while
in the aura.

Dagger. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 5 (1d4) +3 shashing damage.