Council of Five. The ghost has a trait based on who it is, as shown below:
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.
Legendary Resistance (1/Day). If the ghost fails a saving throw, it can choose to succeed instead.
Innate Spellcasting. The ghost's innate spellcasting ability is Wisdom (spell save DC 16, +8 to hit with spell attacks). It can innately cast the following spells, requiring no components:
At will: chill touch (at 5th level, and the ghost regains hit points equal to half the amount of damage the target takes)
1/day each: sanctuary, spirit guardians (at 4th level)
Life Drain. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature. Hit:18 (4d8) necrotic damage, and the ghost regains hit points equal to half the amount of damage the target takes. The target must succeed on a DC 13 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. The target dies if its hit point maximum is reduced to 0. This reduction to the target's hit point maximum lasts until the target finishes a long rest.
Convene the Ghost Council. The ghost summons the other four members of the Obzedat. At the start of the ghost's next turn, the other members appear in unoccupied spaces within 30 feet of the summoner. The ghosts each roll initiative when they appear.
Forced Obedience. A target that all of the Obzedat ghosts can see must succeed on a DC 16 Wisdom saving throw or bow until the end of its next turn. Until this bow ends, the target can't take actions or reactions, and its speed is 0 and can't be increased.
Indentured Spirits (Costs 3 Actions). The Obzedat ghosts conjure 1d6 indentured spirits (described in this chapter) within 60 feet of one of them.
The ghosts who make up the Obzedat are traditionally called patriarchs, though they can be male or female. They are the oldest, wealthiest, and most influential oligarchs of the Orzhov Syndicate. They have been dead for centuries, but they refuse to let go of the fortunes they amassed in life. Addicted to power and prestige, these patriarchs continue to dominate the guild and accumulate even larger fortunes.