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Medium undead, any alignment
Damage Resistances acid, fire, lightning, thunder; bludgeoning, piercing, and slashing from nonmagical attacks
Ethereal Sight. The ghost can see 60 feet into the Ethereal Plane when it is on the Material Plane, and vice versa.
Incorporeal Movement. The ghost 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.
Withering Touch. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 17 (4d6 + 3) necrotic damage.
Etherealness. The ghost 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 × 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.
A ghost is the soul of a once-living creature, bound to haunt a specific location, creature, or object that held significance to it in its life.
Unfinished Business. A ghost yearns to complete some unresolved task from its life. It might seek to avenge its own death, fulfill an oath, or relay a message to a loved one. A ghost might not realize that it has died and continue the everyday routine of its life. Others are driven by wickedness or spite, as with a ghost that refuses to rest until every member of a certain family or organization is dead.
Ghostly Manifestations. Sensations of profound sadness, loneliness, and unfulfilled yearning emanate from places where ghostly hauntings occur. Strange sounds or unnatural silences create an unsettling atmosphere. Cold spots settle in rooms that have roaring fires. A choking stench might seep into the area, inanimate objects might move of their own accord, and corpses might rise from the grave. The ghost has no control over these manifestations; they simply occur.
Undead Nature. A ghost doesn't require air, food, drink, or sleep.