Large undead, unaligned

Armor Class: 16

Hit Points: 173 23d8+69

Speed: , fly: 80 ft , can hover

STR

14 +2

DEX

22 +6

CON

16 +3

INT

17 +3

WIS

15 +2

CHA

14 +2

Saving Throws: CON +8, INT +8

Skills: Insight +7, Intimidation +7, Perception +7, Stealth +16

Damage Vulnerabilities: Radiant

Damage Resistances: Cold; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered

Damage Immunities: Necrotic, Poison; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks

Condition Immunities: Charmed, Exhaustion, Grappled, Paralyzed, Petrified, Poisoned, Prone, Restrained, Unconscious

Senses: Truesight 90 ft., Passive Perception 15

Languages: All

Challenge Rating: 13 ( 10,000 XP)

Proficiency Bonus: +5

Actions

Multiattack. The Desolation Reaper can use its Horrifying Visage. It then makes two Ethereal Scythe attacks, though it can substitute one with its Necrotic Blast.   Ethereal Scythe. Melee Weapon Attack: +11 to hit, range 5 ft., one target. Hit: 17 3d6+6 necrotic damage. The target must succeed on a DC 16 Constitution saving throw or take 1d6 Constitution damage. This damage lasts until the target finishes a long rest. The target dies if its Constitution reaches 0.   Necrotic Blast. Ranged Spell Attack: +11 to hit, range 120 ft., one target. Hit: 15 2d8+6 necrotic damage. The target must succeed on a DC 14 Wisdom saving throw or become paralyzed for 1d4+4 rounds.   Horrifying Visage. Each non-undead creature within 90 feet of the Desolation Reaper that can see it must succeed on a DC 16 Wisdom saving throw or be frightened for 1 minute. A frightened target can repeat the saving throw at the end of each of its turns, with disadvantage if the Desolation Reaper is within line of sight, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to that particular Desolation Reaper’s Horrifying Visage for the next 24 hours.   Plane Shift. The Desolation Reaper may transport between the various mortal planes of existence and the Ethereal Plane (or any demiplane therein) at will. It does not have the power to bring the living with it. While in the Ethereal Plane, it can neither affect nor be affected by creatures on any other plane.

Bonus Actions

Invisibility (Recharge 6). The Desolation Reaper becomes invisible as per Invisibility.   Chase. The Desolation Reaper transports beyond any barrier to appear 5 feet from its quarry. Planar barriers, magic circles, teleportation inhibitors, and other defenses against such teleportation are completely ignored by this action.

Reactions

Solidarity. When the Desolation Reaper has an attack made against it by a creature other than its quarry, it conjures an Aegis Reaper to attack the creature that attacked it. This Aegis Reaper pursues and attacks this singular creature to the best of its ability. This Aegis Reaper is not a true Reaper and vanishes either upon its master's death or its master's culling of its targeted soul. Unless the target it was set upon is also slated for death, the soul is not taken and upon this Aegis Reaper's vanishing, the creature is brought back to life with 1 hit point.

Legendary Actions

The Desolation Reaper can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The Desolation Reaper regains spent legendary actions at the start of his turn.  

• Teleport. The Desolation Reaper magically teleports, along with any equipment it is wearing or carrying, up to 60 feet to an unoccupied space it can see.
• Impending Doom. The Desolation Reaper exudes a sense of impending doom. A creature of its choice in a within 30 feet of it must succeed on a DC 15 Wisdom saving throw or be paralyzed for one round.
• Life Hunter (Costs 3 actions). The Desolation Reaper unleashes a deadly attack that rips the soul out of the body of a target within 30 ft. The target must succeed on a DC 12 Constitution saving throw or die.