Gallows Speaker

Gallows Speaker CR: 6

Medium undead, neutral

Armor Class: 12

Hit Points: 85 19d8 8

Speed: 30 ft , fly: 40 ft , can hover

STR

-5

DEX

14 +2

CON

10 +0

INT

10 +0

WIS

12 +1

CHA

18 +4

Saving Throws: Wis +4

Skills: Perception +7

Damage Resistances: Bludgeoning, Piercing, and Slashing from nonmagical weapons

Damage Immunities: Necrotic, poison

Condition Immunities: Charmed, exhaustion, frightened, grappled, paralysed, petrified, poisoned, prone, restrained

Senses: Truesight 60 ft, passive Perception 17

Languages: Any languages it's component spirits knew in life

Challenge Rating: 6

Divination Senses. The gallows speaker can see up to 60 feet into the Ethereal Plane when it is on the Material Plane and vice versa.
Incorporeal Movement. The gallows speaker can move through other creatures and objects as if they were difficult terrain. It takes 5 [1d10] force damage if it ends it's turn inside an object.
Unusual Nature. The gallows speaker doesn't require air, food, drink, or sleep.

Actions

Foretelling Touch. Melee Spell Attack +7 to hit, reach 5 ft, one creature. Hit 15 2d10+4 psychic damage and the target must roll a d4 and subtract the number from the next attack roll or saving throw it makes before the start of the gallows speaker's next turn.
Suffering Echoes. The gallows speaker targets a creature it can see within 30 feet of it. The target must makes a DC 15 Wisdom saving throw. On a failed save, the target takes 19 {roll:3d12] psychic damage, and waves of painful memories leap from the target to three other creatures of the gallows speaker's choice that are within 30 feet of the target, each of which takes 13 3d8 psychic damage.

Gallows speakers arise in place saturated in death. Each one in an amalgamation of spirits & souls trapped in the Material Plane due to a calamitous, if not, violent death. This can range from natural phenomenon , such as an earthquake or tsunami, especially in regions prone to this, to unnatural means like a battle site, execution site, or regularly used murder site. Each gallows speaker is composed of a number of the dead, and collectively moan in disjointed languages, crying out for peace. If listened to, sometimes a person can discern what happened, and maybe, just maybe, work out a way to set one or more parts of the gallows speaker to rest. A gallows speaker appears as a skeletal figure, dressed in robes and a hood, usually of pale colour, and is immaterial to the touch. 

Suggested Environments

Any area of pain & death.