Animous, the Faceless Champion

Change of Face. The changeling can use its bonus action to polymorph into a Medium humanoid it has seen, or back into its true form. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. 

Lycanthropy. This creature can use its bonus action to change it's form into a hybrid human-wolf beings. It's statistics, other than it's size, are the same in each form. Any equipment it is wearing or carrying is transformed with the creature.

Awakened Mind PHB, pg. 110: You can telepathically speak to any creature you can see within 30 ft. of you if it understands at least one language.

Sneak Attack (Special): Once per turn, you can deal an extra 2d6 damage to one creature you hit with an attack with a finesse or ranged weapon if you have advantage on the attack roll. You don't need advantage on the attack roll if another enemy of the target is within 5 ft. of it, that enemy isn't incapacitated, and you don't have disadvantage on the attack roll.

Fancy Footwork SCAG, pg. 47: During your turn, if you make a melee attack against a creature, that creature can't make opportunity attacks against you for the rest of your turn.

Rakish Audacity SCAG, pg. 47: You add your CHA modifier (+5) to your initiative rolls.You don't need advantage on the attack roll to use your Sneak Attack against a creature if you are within 5 ft. of it, no other creatures are within 5 ft. of you, and you don't have disadvantage on the attack roll.

Devil's Sight PHB, pg. 110: You can see normally in darkness, both magical and nonmagical, to a distance of 120 ft.

Eldritch Mind TCoE, pg.71: You have advantage on Constitution saving throws that you make to maintain your concentration on a spell.

Repelling Blast PHB: When you hit a creature with eldritch blast, you can push the creature up to 10 feet away from you in a straight line.

Pact Boon: Pact of the Talisman (Special): When the wearer of your Talisman fails an ability check, they can add a d4 to the roll, potentially turning the roll into a success. This benefit can be used 4 times, and all expended uses are restored when you finish a long rest.

Multiattack. The changeling makes two attacks with its shadow blades.

Shadow Blades. Melee: +9 to hit, reach 5 ft., one target. Hit: 26 (3d8 + 5) psychic damage.

Refer to PC spell list for cantrips and spells

Actions in Combat: Two-Weapon Fighting

Spells: Hex (1st), Misty Step (2nd), Shadow Blade (2nd), Spirit Shroud (3rd)

Change of Face: As a bonus action you can change your appearance quickly instead of using an action to change appearance

Cunning Action: You can take a bonus action on each of your turns to take the Dash, Disengage, or Hide action.

Maddening Hex: As a bonus action, the creature can deal +5 psychic damage to the target it is cursing, that you can see if it is within 30 ft, and also to creatures of your choice within 5 ft. of the cursed target.

Entropic Ward. Once per short rest, when a creature makes a ln attack roll against it, the creature can improve disadvantage on that roll. If it misses the creature, it's next attack roll against that opponent is made with advantage of the attack is made before the end of it's next turn. 

Opportunity Attack

Smoldering Darkness: Flame-like shadows wreathe your body for one minute, causing you to become heavily obscured to others. The shadows turn dim light within 10 feet of you into darkness, and bright light in the same area to dim light.

The creature has resistance to radiant damage. In addition, whenever a creature within 10 feet of you hits you with an attack, the shadows lash out at that creature, dealing it 2d8 necrotic damage.