Changeling Demon

Possession. The Changeling can evaporate to a vapor and enter a host's body and control it.  The Changeling can do this as a bonus action and must end the possession through a bonus action, or an action.  Possession is also ended when the possessed character dies.

When a character is possessed by the Changeling, the changeling has access to all the character's abilities and actions.  The character may resist possession at the time of attack and at the start of every subsequent turn with a willpower (wisdom) save of 13.  The character may also attempt a willpower save against the Changeling whenever he takes damage.  When the Changeling possession ends, it emerges within 30 feet of the possessed character.  The Chameleon does not incur the damage of its host.

The Chameleon may attempt a possession once per day.

Multiple Attack.  The changeling while in demon form can attack two times per turn.

Claw Attack. In demon form the Changeling can attack with it's claws.

Action Melee Attack. Claw Rake: +3 to hit, reach 5 ft., # target. Hit: 7 (1d8 + 2) [damage type] damage. 

Action Ranged Attack. Bile Spit: +2 to hit, range 5/30 ft., 1 target. Hit: 7 (1d8 +2) acid damage.

Possession, Changeling 

Infernal Shriek.  Upon taking damage in demon form the Changeling may utter a horrific shriek that may momentarily frighten anyone within 5 feet.  

All players within 5 feet must pass a willpower (wisdom) save of 8.  Upon failure any engaged player is compelled to disengage with the Changeling, allowing an attack of opportunity.  Any non-engaged player that fails the willpower save must move back 5 feet in horror and revulsion.