Wolf in sheep's clothing:  the Ego Walker can imitate any humanoid that it has eaten as long as its day time, while the Ego Walker is imitating someone it has advantage on deception checks.

Spellcasting. The Ego Walkers innate spellcasting ability is Charisma (spell save DC 16). It can innately cast the following spells, not requiring material components:
At will: minor illusion, misty step

Spellcasting. The Ego Walker is a 5th level spellcaster. Its spellcasting ability is Charisma (spell save DC 16, +7 to hit with spell attacks). It has the following spells prepared: 
Cantrips (at will): mage hand, friends, minor illusion, lightning lure
1st level (3 slots): hex, charm person, silvery barbs
2nd level (2 slots): darkness, crown of madness
3rd level (1 slots): thunder step

Multiattack: the Ego Walker makes two slashing attacks.

Slash: Melee Weapon Attack: 1d20+7 to hit, reach 5ft, 2d6+6 Slashing Damage

Echo's of the past (recharge 1d6 5-6): the Ego Walker summons 2 clones anywhere that it can see within 30ft range that have the same stats but only have 15 hp, the clones can cast and use other actions alike taking away from the Ego Walkers resource (Slash doesn't take away resources).

Swallowing Shadows: the Ego Walker can switch places with one of its clones making the clone take the damage instead (60ft).