voice of Kredos

demonic Fortitude. If damage reduces the voice to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the voice drops to 2 hitpoints instead.

 Rotting Presence. When any creature that isn’t a demon starts its turn within 30 feet on that creature must succeed on a DC 14 Constitution saving throw or take 1d6 necrotic damage plus 1 necrotic damage for each Bulezau within 30 feet of it. 

 Legendary Resistance (3/Day). If the voice fails a saving throw, it can choose to succeed instead.

Withering Touch. Melee Spell Attack: +8 to hit, reach 10 ft., one creature. Hit: 8 (2d8) necrotic damage. 

spellcasting:

spell save DC 16 spell attack +8

Cantrips (at will): fire bolt, mage hand, minor illusion

1st level (4 slots):  inflict wounds,  sleep,Ray of Sickness,bane

2nd level (2 slots): phantasmal force, invisibility, Ray of Enfeeblement

3rd level (3 slots): blight, fly,bestow curse

4th level (1 slot): wall of sand

rot.  corrodes a nonmagical organic object it can see within 10 feet of it. If the object isn't being worn or carried, the touch destroys a 1-foot cube of it. If the object is being worn or carried by a creature, the creature can make a DC 16 Dexterity saving throw to avoid the touch.

If the object touched is either armor or a shield being worn or carried, it takes a permanent and cumulative −1 penalty to the AC it offers. Armor reduced to an AC of 10 or a shield that drops to a +0 bonus is destroyed. If the object touched is a held weapon, it corrodes as described in the corrode trait.

corrode. Any nonmagical weapon After hit by rot, the weapon takes a permanent and cumulative −1 until it drops to a +0 bonus than it is destroyed