Ghost of a Master

Medium undead, lawful evil

Armor Class 18 (natural armor)
Hit Points 66 (12d8 + 12)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
10 (+0)	18 (+4)	13 (+1)	11 (+0)	18 (+4)	14 (+2)

Saving Throws Dexterity +7, Wisdom +7
Skills Acrobatics +7, Stealth +7
Damage Resistances acid, fire, lightning, thunder; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities cold, necrotic, poison
Condition Immunities charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained
Senses darkvision 60 ft., passive Perception 14
Languages Common, Infernal
Challenge 8 (3,900 XP)

Special Traits

• Fists of Dark Flame (1/day). The ghost of a master wreaths its fists in flame. It deals an additional 7 (2d6) fire damage when it hits with its Unarmed Strikes for 1 minute.
• Ethereal Sight. The ghost of the master can see 60 feet into the Ethereal Plane when it is on the Material Plane, and vice versa.
• Incorporeal Movement. The ghost of a master 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.

Actions

• Multiattack. The ghost of a master makes three Unarmed Strikes. It can use its Flurry of Blows ability in place of one of the Unarmed Strikes.
• Unarmed Strike. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) necrotic damage.
• Flurry of Blows (3/day). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (3d6 + 4) necrotic damage, and the target suffers one of the following effects of the ghost of a master’s choice: The target must succeed on a DC 15 Dexterity saving throw or be knocked prone. The target must make a DC 15 Strength saving throw or be pushed up to 15 feet away from it. The target can’t take reactions until the end of its next turn.
• Etherealness. The ghost of a master enters the Ethereal Plane from the Material Plane, or vice versa. It is visible on the Material Plane while it is in the Border Ethereal, and vice versa, yet it can’t affect or be affected by anything on the other plane.
• Horrifying Visage. Each non-undead creature within 60 feet of the ghost that can see it must succeed on a DC 13 Wisdom saving throw or be frightened for 1 minute. If the save fails by 5 or more, the target also ages 1d4 x 10 years. A frightened target can repeat the saving throw at the end of each of its turns, ending the frightened condition on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to this ghost’s Horrifying Visage for the next 24 hours. The aging effect can be reversed with a greater restoration spell, but only within 24 hours of it occurring.
• Possession (recharge 6). One humanoid that the ghost can see within 5 feet of it must succeed on a DC 13 Charisma saving throw or be possessed by the ghost; the ghost then disappears, and the target is incapacitated and loses control of its body. The ghost now controls the body but doesn’t deprive the target of awareness. The ghost can’t be targeted by any attack, spell, or other effect, except ones that turn undead, and it retains its alignment, Intelligence, Wisdom, Charisma, and immunity to being charmed and frightened. It otherwise uses the possessed target’s statistics, but doesn’t gain access to the target’s knowledge, class features, or proficiencies. The possession lasts until the body drops to 0 hit points, the ghost ends it as a bonus action, or the ghost is turned or forced out by an effect like the dispel evil and good spell. When the possession ends, the ghost reappears in an unoccupied space within 5 feet of the body. The target is immune to this ghost’s Possession for 24 hours after succeeding on the saving throw or after the possession ends.