Corrupting Spirit

 Face of fear. The spirit looks at any person with in 15ft they roll a DC 16 CHA saving throw, on fail they become frightened.

Incorporeal Movement. The ghost can move through other creatures and objects as if they were difficult terrain. It takes 4 (1d6) force damage if it ends its turn inside an object.

Withering Touch. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 17 (4d6 + 3) necrotic damage.

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.

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. 

Dark Possession. The user chooses one person with in 10ft of them to make a DC 15 CHA save. On fail the Corrupting spirit disappears from the material plane and possesses the target. The target loses all sence of control. If the possession breaks the target loses all memory of there possession.