Flyby. The vogheist doesn’t provoke an opportunity attack when it flies out of an enemy’s reach.

Open Chest. The vogheist can transport up to 20 small creatures in his chest, each medium creature takes the place of 2 small ones, each Large takes the place of 4 small creatures and Huge Creatures takes 10 places.

Death from the skies. When the Vogheist finish a move at 5ft or less of an enemy, the later takes 4d8 bludgeoning damage.

Eternal Undead (Vogheist). This monster can created with the Animate Dead spell but requires a Qetzalcoatlus’ skeleton and a troll’s skeleton and you can animate 7 corpses less.

Multiattack. The Vogheist makes two Claws attacks, two wings attacks and one Bite attack.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) piercing damage.

Claws. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) slashing damage.

Wing. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 11 (1D12 + 5) piercing damage and 7 (1D12) necrotic damage.

Necromantic Breath. The Vogheist exhalates a ball of necromantic energy that splashes to a point at 40ft or less. All creatures in a 20ft Cone originated from the impact point makes a DC 18 constitution saving throw on a fail it takes 6D8 necrotic damage. 

Parry. Add 2 to the AC of this monster.

The vogheist can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The vogheist regains spent legendary actions at the start of its turn.

Wing Swipe. The Vogheist made 2 wings attack 

Terror Aspect. All the creature of the vogheist choice at 20ft or less make a DC 18 wisdom saving throw if failed their frightened, while frightened in this way they are also incapacited.