Aeronees

Telepathic Bond. The fiend ignores the range restriction on its telepathy when communicating with a creature it has charmed. 

Shapechanger. The fiend can use its action to polymorph into a Small or Medium humanoid, or back into its true form. It can also summon skeletal wings. Without wings, the fiend loses its flying speed. Other than its size and speed, its statistics are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Poisoned Blood. The fiend's blood is poisonous black sludge. In melee battle, if she takes slashing or piercing damage- enemies with 10 ft have to make either a DE12 dexterity or constition save or suffer (1d8) poison damage. (no additional damage if saving throw is made).  If failed, poison continues and stacks damage each round until a saving throw is made or the condition is treated by a lesser restoration spell or other similar magic.

Multi-attack- Two attacks per round.

Claw attack. Melee Weapon Attack: slashing damage (1d6) plus (1d8 poison damage) if target fails a DC12 constitution saving throw. If failed, poison continues and stacks damage each round until a saving throw is made or the condition is treated by a lesser restoration spell or other similar magic.

Longbow attack with poisoned arrow.  The fiend carries a longbow (+2 to hit) and a quiver of 15 poisoned arrows (2d8 piercing damage plus 1d8 poison damage). Range is 150/600 ft. Can use multi-attack to attack two targets per round, or attack a single target twice. Upon a successful hit, the target must make a DC12 constitution saving throw. If failed, poison continues and stacks damage each round until a saving throw is made or the condition is treated by a lesser restoration spell or other similar magic. Fiend can produce additional poisoned arrows by coating them with her blood (taking 1d10 damage to herself in the process) but can have no more than fifteen arrows total in her quiver.

Charm. One humanoid the fiend can see within 30 feet of it must succeed on a DC 15 Wisdom saving throw or be magically charmed for 1 day. The target obeys the fiend's verbal or telepathic commands (no distance limit on telepathic communication while charmed). If the target suffers any harm, it can repeat the saving throw, ending the effect on a success. If the target successfully saves against the effect, or if the effect on it expires with time, the target becomes immune to this fiend's Charm for the next 24 hours and has advantage on future saving throws after that period. The fiend can attempt to recharm the target one time per day. If charmed when the reattempt is made, it will give the target disadvantage on that saving throw. If the saving throw is failed, the charm condition is extended by another 24 hours.

The fiend can have only one charmed target at a time. If it charms another, the effect on the previous target ends.

Vampiric Kiss. The fiend kisses a creature charmed by it or a willing creature. The target must make a DC 15 Constitution saving throw against this magic, taking (5d10) psychic damage on a failed save, or half as much damage on a successful one. The fiend receives temporary hit points in the same amount that last until the next long rest.

Fiend can summon or unsummon its skeletal wings as a bonus action.

If wings are summoned during a melee battle the fiend's AC is increased by 4. Also, the fiend can use them to Parry one attack that otherwise would have hit per round.