Idea was to create a modified vrock, but it took a life of its own and got something a bit more unique than a reskinned vrock.
LEUKODAEMON
Large fiend (daemon), neutral evil
Armour Class 17 (natural armor)
Hit Points 146 (12d10 + 44)
Speed 40 ft., fly 60 ft.
STR 17 (+3) DEX 15 (+2) CON 18 (+4)
INT 8 (-1) WIS 13 (+1) CHA 8 (-1)
Saving Throws Dex +5, Wis +4, Cha +2
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing from non-magical weapons
Damage Immunities disease, poison
Condition Immunities poisoned
Senses darkvision 120ft., passive Perception ll
Languages Abyssal, telepathy 120ft.
Challenge 10 (5,900 XP)
Magic Resistance. The leukodaemon has advantage on saving throws against spells and other magical effects.
Infectious Aura. All creatures within 50 feet of a leukodaemon have disadvantage on Constitution saving throws.
ACTIONS
Multiattack. The leukodaemon makes three attacks: one with its beak and one with its talons. Alternatively it makes one attack with its bow of malady.
Beak. Melee Weapon Attack: +8 to hit, reach 10 ft., one target.
Hit: 10 (2d6 + 3) piercing damage.
Talons. Melee Weapon Attack: +8 to hit, reach 10 ft., one target.
Hit: 14 (2d10 + 3) slashing damage.
Bow of Malady. Ranged Weapon Attack: +7 to hit, reach 120 ft., one target.
Hit: 16 (4d6 + 2) piercing damage plus 24 (7d6) necrotic damage, and the target’s hit point maximum is reduced by an amount equal to the necrotic damage taken. If this effect reduces a creature’s hit point maximum to 0, the creature dies. This reduction to a creature’s hit point maximum lasts until the creature finishes a long rest or until it is affected by a spell like greater restoration.
In addition the creature suffers from a disease as the Contagion spell if it fails a DC 16 Constitution saving throw. Roll randomly to determine the disease affect or pick the most appropriate disease (PHB pg. 227)
Breath of Flies (Recharge 6). A leukodaemon can unleash a cloud of corpse-bloated, biting black flies in a 20-foot cone. Those caught in the cone take 24 (8d6) points of slashing damage. A DC 16 Dexterity save halves this damage. Those who take any damage are also poisoned for 1 minute. In addition, the flies linger for 1 minute, congealing into a buzzing 20-foot-square cloud centered on the cone’s original point of origin. Any creature that ends its turn in this cloud must make a DC 16 Dexterity save to avoid taking 12 (4d6) points of slashing damage and becoming poisoned for 1 minute. This cloud of flies may be dispersed by any area effect that does damage or creates wind of at least strong wind force. All daemons are immune to this effect.
DESCRIPTION
This human-shaped beast has a vulture’s skull for a head. It walks on cracked hooves and bears the rotting wings of a carrion bird.
A group of four advanced leukodaemons devoted to the servitude of Zyphus stands guard here— each of these creatures wears the skull of a vulture rather than that of a horse to denote that they serve Zyphus rather than a Horseman