Death incarnate. This creature is an avatar of finality and death. All light sources (including magical ones) within 30 feet of the avatar are extinguished and all non-magical bright light within 60 feet of the Avatar becomes dim light.

Incorporeal Movement. The avatar can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Turning Immunity. The avatar is immune to features that turn undead.

Legendary Resistance (3/day). If the avatar fails a saving throw it can choose to succeed instead.

Magic Weapons. The avatar's weapon attacks are magical and all attacks that deal necrotic damage ignore resistance to necrotic damage.

Spellcasting. The avatar can cast the following spells requiring no material components and using Wisdom as the spellcasting ability (Save DC 20):

at will: cause fear, command, blindness/deafness

2/day each: blight, Shadow of Moil, Banishment, Flame Strike, Animate Dead (1 action and the Undead are permanently under the avatar's control)

2/day:  Negative Energy Flood, Eyebite

Multiattack. The avatar makes two Reaping Judgment or Sapping Sting attacks. Alternately it can cast a spell and then use Tolling Bells (If available).

Reaping Judgment. Melee weapon attack: +10 to hit, reach 10ft., one target. Hit: 17 (3d8 + 4) slashing damage plus 22 (4d10) necrotic damage.

Sapping Sting. Ranged spell attack: +12 to hit, range 30ft., one target. Hit: 18 (4d8) necrotic damage and the target must succeed on a CON save (DC 20) or have its hit point maximum decreased by an amount equal to half the necrotic damage taken. This effect lasts until the creature long rests. This cannot reduce a creatures hit point maximum bellow 1.

Tolling Bells  (Recharge 5-6) The avatar targets one creature it can see within 60 feet of itself. The target must succeed on a CON save (DC 20). On a failed save, it takes 35 (10d6) necrotic damage and gains disadvantage on all attack rolls that use strength or dexterity until the end of their next turn as their body weakens and withers. On a successful save the creature takes half as much damage and suffers no additional effects.

Asthenic Step. The avatar teleports to an unoccupied space it can see within 60ft of it. This space must be in dim-light or darkness. When the avatar does so, all creatures within 10 feet of the space it left must succeed on a CON save (DC 20) or become poisoned until the end of their next turn.

Peck of Shadows (Costs 2 actions). Melee weapon attack: +10 to hit, reach 5ft., one target. Hit: 23 (3d12+4) psychic damage and the target must succeed on a DC 20 wisdom saving throw or be stunned until the beginning of their next turn.

Teleport. The avatar uses Asthenic Step.

Spellcasting (Costs 2 actions). The avatar uses its spellcasting trait once