Crossroads Demon (Lesser)

Spellcasting. The Crossroads Demon is a 3rd level spellcaster. Their spellcasting ability is Charisma (spell save DC 12, +6 to hit with spell attacks). The Crossroads Demon has the following spells prepared.

Cantrip (at will): Scorching Ray, Misty step, Find Familiar

1st level (3 slots): Burning Hands, Detect Magic

Telepathic Bond. The fiend ignores the range restriction on its telepathy when communicating with a creature it has charmed. The two don't even need to be on the same plane of existence.

Shapechanger. The fiend can use its action to polymorph into a Small or Medium humanoid, or back into its true form. 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.

Grant wish. The Fiend is able to expend a Wish spell to one creatures per month. The Fiend is able to then decide what the price for the wish is (At Dm's discretion). The Fiend then has the ability to know the exact location of the bonded creature until the price is paid completely. 

Claw (Fiend Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Charm. One humanoid the fiend can see within 30 feet of it must succeed on a DC 12 Wisdom saving throw or be magically charmed for 1 day. The charmed target obeys the fiend's verbal or telepathic commands. If the target suffers any harm or receives a suicidal command, 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 ends, the target is immune to this fiend's Charm for the next 24 hours.

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

Etherealness. As a bonus action the fiend magically enters the Ethereal Plane from the Material Plane, or vice versa.